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20th Century 21st century 69 Abuse Abuse of Power Abused Female Lead Abusive Male Lead Abusive Parents Academy Acting Action Adopted Male Lead Adoption Adult Adult Character Adult Female Character Adult Female Lead Adult Male Lead Adult Protagonist Adultery Adventure Affairs Age Gap Age Regression Aggressive Female Lead Aggressive Male Lead Ahegao AI Generated Alcohol Ambiguous Relationship Anal Creampie Anal Fingering Anal Intercourse Ancient Korea Anilingus Animal Characteristics Anthology Anthropomorphic Anti-Hero Apocalypse Archery Arranged Marriage Arrogant Characters Arrogant Female Lead Assassins Assertive Female Lead Assertive Male Lead Athletic Female Lead Attempted Murder Attempted Rape Attempted Suicide Aunt-Nephew Relationship Australia Bar Based on a Light Novel Based on a Novel Based on a Web Novel Bathroom Intercourse BDSM Beautiful Female Character Beautiful Female Lead Betrayal Big Areolae Big Ass Big Breasts Big Penis Bisexual Bisexual Female Lead Bisexual Protagonist Blackmail Blonde-Haired Character Blonde-Haired Female Lead Body Horror Body Swapping Bodyguard Bodyguard-Boss Relationship Bold Female Lead Bondage Boobjob Borderline H Boss-Employee Relationship Boss-Subordinate Relationship Boxing Breakup Brother Complex Brother-Sister Relationship Brown-Eyed Character Brown-Haired Character Brown-Haired Female Lead Brown-Haired Male Lead Bukkake Bullied Female Lead Bullied Male Lead Bullied Protagonist Bully Bullying Bunny Girl Calm Female Lead Camping Cancelled Carefree Female Lead Cats Caught in the Act Censorship Cheating Female Lead Cheating Male Lead Cheerleading Chibi Child Abuse Childhood Friends Childhood Friends to Lovers Classroom Intercourse Cleaning Clothed Intercourse Cohabitation Cold Female Lead Collection of Stories College College Student Female Lead College Student Male Lead Comedic Undertone Comedic Violence Comedy Company Complicated Relationships Concubine Confident Male Lead Cool Female Lead Corruption Cosplay Countryside 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Exhibitionist Male Lead Extortion Eye Powers Facial Family Drama Family Life Famous Female Lead Fantasy Fantasy World Fat Male Lead Feet Female Bully Female Empowerment Female Harem Female Lead Female Lead Falls in Love First Femdom Fetishes Feudal Japan Filmed Intercourse Fingering First Kiss First Love Fitness Flashbacks Flirtatious Female Lead Football Footjob Forbidden Love Foreign Found Family Friends Become Rivals Full Censorship Full Color Game Elements Gang Rape Gender Bender gender_bender Ghosts Glasses-Wearing Character/s Glasses-Wearing Female Lead Goddess Gods Gore Group Intercourse Gyaru Half-Elf Half-Siblings Handjob Handsome Male Lead Hard-Working Male Lead Harem Harem Ending Harem Subtext Harem-Seeking Female Lead Harem-Seeking Male Lead hentai Hero Heterochromia Heterosexual Hiatus Hidden Identity Hidden past Historical Horny Characters Horny Female Character Horny Female Lead Horny Male Lead Horror Hospital Hospital Intercourse Human Pets Hypersexuality Idol Female Lead Idols Imminent Death Impregnation Imprisoned Female Lead Impulsive Male Lead Incest Inconsistent Art Style Inexperienced Female Lead Inexperienced Male Lead Infidelity Inseki Insertion of Non-Sex Toys Intercrural Intercourse Interracial Intercourse Introverted Female Lead Isekai Isekaied Into a Novel Japan Jealous Female Lead Jealous Male Lead Jealousy Josei Kemonomimi Kidnapping Kind Male Lead Kissing Kitchen Intercourse Korean Folklore Lactation Lawyers Level System LGBTQ+ LGBTQ+ Characters Lingerie Loner Protagonist Long-Haired Female Lead Longstrip Love Confession Love Hotel Love Polygon Love Triangle Love-Hate Relationship Lust Lying Female Lead Lying Male Lead Magic Maids Male Lead Male Lead has Multiple Sexual Partners Male Lead with Children Manager-Talent Relationship Manipulative Antagonists Manipulative Female Lead Manipulative Male Lead Manipulative Protagonist Marriage Married Couple Married Female Lead Married Male Lead Martial Arts martial_arts Masochism Masochist 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Perverted Male Lead Perverted Protagonist Perverts Piercings Pink-Haired Female Lead Pirates Plain-Looking Male Lead Play or Die Situation Playboys Police Polyamory Polygamy Pool Poor Male Lead Popular Female Lead Post-Apocalyptic Pregnancy Pretending Female Lead Priests Primarily Adult Cast Primarily Female Cast Prison Sex Promiscuous Character Promiscuous Male Lead Prostitution Protagonist Strong from the Start Psychological Public Intercourse Purple/Violet-Haired Female Lead Rape Rape as a Start of Relationship Rapist Male Lead Rapist Protagonist Red-Haired Female Lead Regressed Male Lead Religion Restaurant Intercourse Reunion Revenge Rich Characters Rich Female Lead Rich Male Lead Rich Protagonist Romance Romantic Subplot Rooftop Intercourse Rough Sex Rude Female Lead Rural Rushed Ending Ruthless Male Lead Ruthless Protagonist Sadism Sadistic Male Lead Sadists Sadomasochism Samurai Saving the World Scarred Male Lead Scars Scheming Male Lead School School Clubs School Intercourse School Life School Uniform school_life Sci-Fi Sci-fi Elements Scuba Diving Second Chance Secretary Security Guard Seduction Seinen Selfish Male Lead Sex Addict Sex Friends Sex From Behind Sex in Front of an Audience Sex Slave Sex Toys Sex Training Sexless Marriage Sexual Abuse Sexual Acts Sexual Assault Sexual Coercion Sexual Curiosity Sexual Fantasy Sexual Favors Sexual Harassment Sexual Harassment Played for Comedy Sexual Tension Sexually Active Couple Sexually Active Female Lead Sexually Active Male Lead Sexually Active Protagonist Sexually Insatiable Female Lead Sexually Insatiable Male Lead Shameless Female Lead Short Female Lead Short-Haired Female Lead Short-Tempered Female Lead Shounen Shower Sex Shy Female Lead Simple Sisters Slavery Slice of Life slice_of_life Slow Romance Small Breasts Small Penis Smart Female Lead Smart Male Lead Smut South Korea Spirits Sports Spy Squirting Stalkers Stepbrother-Stepsister Relationship Stepsibling Love Straightforward Female Lead Strong Female Lead Strong Male Lead Strong Protagonist Stubborn Female Lead Submissive Female Lead Succubus Summoned Into Another World Super Powers Superheroes Supernatural Swimsuit Swordplay Tall Female Lead Tanned Skin Teacher-Ex-Student Relationship Teachers Teasing Character Teasing Male Lead Teens Love Theater Thieves Threesome Time Manipulation Time Skip Time Travel Toilet Intercourse Tomboyish Female Lead Torture Tragedy Tragic Past Training Trauma Traumatic Past Traumatized Female Lead Traumatized Male Lead Tsundere Tsundere Female Lead Twins Two-Faced Female Lead Ugly Male Lead Uncle-Niece Relationship University Intercourse University Student Male Lead Unrequited Love Urban Urination Villain Protagonist Vindictive Male Lead Violence Violent Male Lead Virgin Female Lead Virgin Male Lead Virginity Voluptuous Female Lead Voyeur Water sports Weak Male Lead Weak to Strong Weak-Willed Male Lead Web Comic White/Silver-Haired Protagonist Working Workplace Intercourse Writers Writing Yandere Young Male Lead Yuri Zombies

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Abused Female Lead

Abusive Male Lead

Abusive Parents

Adopted Male Lead

Adult Character

Adult Female Character

Adult Female Lead

Adult Male Lead

Adult Protagonist

Aggressive Female Lead

Aggressive Male Lead

Ambiguous Relationship

Anal Intercourse

Animal Characteristics

Anthropomorphic

Arranged Marriage

Arrogant Characters

Arrogant Female Lead

Assertive Female Lead

Assertive Male Lead

Athletic Female Lead

Attempted Murder

Attempted Suicide

Aunt-Nephew Relationship

Based on a Light Novel

Based on a Novel

Based on a Web Novel

Bathroom Intercourse

Beautiful Female Character

Beautiful Female Lead

Bisexual Female Lead

Bisexual Protagonist

Blonde-Haired Character

Blonde-Haired Female Lead

Bodyguard-Boss Relationship

Bold Female Lead

Boss-Employee Relationship

Boss-Subordinate Relationship

Brother Complex

Brother-Sister Relationship

Brown-Eyed Character

Brown-Haired Character

Brown-Haired Female Lead

Brown-Haired Male Lead

Bullied Female Lead

Bullied Male Lead

Bullied Protagonist

Calm Female Lead

Carefree Female Lead

Caught in the Act

Cheating Female Lead

Cheating Male Lead

Childhood Friends

Childhood Friends to Lovers

Classroom Intercourse

Clothed Intercourse

Cold Female Lead

Collection of Stories

College Student Female Lead

College Student Male Lead

Comedic Undertone

Comedic Violence

Complicated Relationships

Confident Male Lead

Cool Female Lead

Crazy Male Lead

Cross-dressing Female Lead

Cruel Male Lead

Cunning Female Lead

Cunning Male Lead

Cute Female Lead

Dark/Tan Skin Female Character

Dark/Tan Skin Female Lead

Dark/Tan Skin Male Lead

Dead Family Member

Death of Loved One

Delinquent Male Lead

Devoted Female Lead

Divorced Female Lead

Dominant Female Lead

Dominant Male Lead

Double/Multiple Penetration

Drunken Intercourse

Dubious Consent

Dumb Female Lead

Eager Female Lead

Easily Embarrassed Female Lead

Elf Female Lead

Emotionally Strong Female Lead

Emotionally Strong Male Lead

Emotionally Weak Female Lead

Emotionally Weak Male Lead

Enemies Become Lovers

Enslaved Male Lead

European Ambience

Evil Protagonist

Exhibitionist Female Lead

Exhibitionist Male Lead

Famous Female Lead

Female Empowerment

Female Lead Falls in Love First

Filmed Intercourse

Flirtatious Female Lead

Friends Become Rivals

Full Censorship

Glasses-Wearing Character/s

Glasses-Wearing Female Lead

Group Intercourse

Handsome Male Lead

Hard-Working Male Lead

Harem-Seeking Female Lead

Harem-Seeking Male Lead

Hidden Identity

Horny Characters

Horny Female Character

Horny Female Lead

Horny Male Lead

Hospital Intercourse

Idol Female Lead

Imprisoned Female Lead

Impulsive Male Lead

Inconsistent Art Style

Inexperienced Female Lead

Inexperienced Male Lead

Insertion of Non-Sex Toys

Intercrural Intercourse

Interracial Intercourse

Introverted Female Lead

Isekaied Into a Novel

Jealous Female Lead

Jealous Male Lead

Kitchen Intercourse

Korean Folklore

LGBTQ+ Characters

Loner Protagonist

Long-Haired Female Lead

Love Confession

Love-Hate Relationship

Lying Female Lead

Lying Male Lead

Male Lead has Multiple Sexual Partners

Male Lead with Children

Manager-Talent Relationship

Manipulative Antagonists

Manipulative Female Lead

Manipulative Male Lead

Manipulative Protagonist

Married Female Lead

Married Male Lead

Masochistic Female Lead

Master-Pet Relationship

Master-Servant Relationship

Master-Slave Relationship

Mature Female Lead

Military School

Misunderstandings

Mother and Daughter

Multiple Couples

Multiple Sexual Partners

Muscular Male Lead

Naive Male Lead

Nerdy Protagonist

Non-Human Protagonist

Non-Linear Storytelling

Obedient Female Lead

Office Intercourse

Official English Uncensored

Older Female Lead

Older Female Younger Male

Older Male Younger Female

Open Relationship

Oral Intercourse

Orphan Male Lead

Outdoor Activities

Outdoor Intercourse

Past Plays a Big Role

Perverted Female Lead

Perverted Male Lead

Perverted Protagonist

Pink-Haired Female Lead

Plain-Looking Male Lead

Play or Die Situation

Popular Female Lead

Post-Apocalyptic

Pretending Female Lead

Primarily Adult Cast

Primarily Female Cast

Promiscuous Character

Promiscuous Male Lead

Protagonist Strong from the Start

Public Intercourse

Purple/Violet-Haired Female Lead

Rape as a Start of Relationship

Rapist Male Lead

Rapist Protagonist

Red-Haired Female Lead

Regressed Male Lead

Restaurant Intercourse

Rich Characters

Rich Female Lead

Rich Protagonist

Romantic Subplot

Rooftop Intercourse

Rude Female Lead

Ruthless Male Lead

Ruthless Protagonist

Sadistic Male Lead

Saving the World

Scarred Male Lead

Scheming Male Lead

School Intercourse

Sci-fi Elements

Selfish Male Lead

Sex From Behind

Sex in Front of an Audience

Sexless Marriage

Sexual Coercion

Sexual Curiosity

Sexual Harassment

Sexual Harassment Played for Comedy

Sexually Active Couple

Sexually Active Female Lead

Sexually Active Male Lead

Sexually Active Protagonist

Sexually Insatiable Female Lead

Sexually Insatiable Male Lead

Shameless Female Lead

Short Female Lead

Short-Haired Female Lead

Short-Tempered Female Lead

Shy Female Lead

Smart Female Lead

Smart Male Lead

Stepbrother-Stepsister Relationship

Stepsibling Love

Straightforward Female Lead

Strong Female Lead

Strong Male Lead

Strong Protagonist

Stubborn Female Lead

Submissive Female Lead

Summoned Into Another World

Tall Female Lead

Teacher-Ex-Student Relationship

Teasing Character

Teasing Male Lead

Time Manipulation

Toilet Intercourse

Tomboyish Female Lead

Traumatized Female Lead

Traumatized Male Lead

Tsundere Female Lead

Two-Faced Female Lead

Uncle-Niece Relationship

University Intercourse

University Student Male Lead

Unrequited Love

Villain Protagonist

Vindictive Male Lead

Violent Male Lead

Virgin Female Lead

Virgin Male Lead

Voluptuous Female Lead

Weak-Willed Male Lead

White/Silver-Haired Protagonist

Workplace Intercourse

Young Male Lead

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My Sister Has Amnesia— What’s Sex?

My Sister Has Amnesia— What’s Sex?

My Sister Has Amnesia— What’s Sex?

Alternative: Ore no Aneki wa Kioku Soushitsu - Sex tte Nani?, Teaching Sex to My Amnesiac Sister, 俺の姉貴は記憶喪失－セックスってなぁに？, 나의 누님은 기억상실

Genres:

Drama Comedy Romance Full Color Harem Incest

Artist: Satoru

Type: Manga

Status: Completed

Updated: 5 days ago

Views: 0

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0.0 /5 from 0 ratings

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My sister lost her memory, and all knowledge of sex, in an accident, and now we’re living a passionate life together doing it over and over again!

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