After the sudden accidental death of their mother, the lives of the Akitsugawa sisters take a drastic turn. On the night of their mother's funeral, their stepfather makes an unreasonable demand, stating that from then on, it is their duty as daughters to fulfill his sexual desires. He leaves it up to the elder sister, Sumire, to decide which one of them will become his object of pleasure. Sumire, torn by conflicting emotions, makes a fateful choice. Thus begins a period of humiliation and violation as she is subjected to her stepfather's desires. The story further unfolds as she becomes entangled with various other men, leading to her gradual deterioration and destruction.
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| Name | Characters | Importance | Weight |
|---|---|---|---|
| Ugly Body | 2 | 2.55 | 2.80 |
| Rope Bondage Engages in (Sexual) | 2 | 2.54 | 2.79 |
| Non-consensual Porn Acting Subject of (Sexual) | 2 | 2.38 | 2.61 |
| Non-blood-related Daughter Role | 2 | 2.35 | 2.58 |
| Rope Bondage Harness Clothes | 2 | 2.29 | 2.52 |
| Sex on Roof Engages in (Sexual) | 2 | 2.29 | 2.52 |
| Food Play Engages in (Sexual) | 2 | 2.23 | 2.45 |
| Leather Bondage Engages in (Sexual) | 1 | 3.51 | 2.43 |
| Non-blood-related Incest Engages in (Sexual) | 2 | 2.15 | 2.37 |
| Group Sex of One Female and Several Males Engages in (Sexual) | 3 | 1.70 | 2.35 |
| Olive Body | 3 | 1.66 | 2.30 |
| Slave Collar Clothes | 2 | 2.09 | 2.29 |
| Sexual Slavery (Choukyou Variation) Subject of (Sexual) | 2 | 1.99 | 2.19 |
| Panty Gag Subject of (Sexual) | 1 | 3.15 | 2.19 |
| Overweight Body | 2 | 1.99 | 2.18 |
| Rape Subject of (Sexual) | 3 | 1.57 | 2.17 |
| Cunnilingus Engages in (Sexual) | 3 | 1.55 | 2.15 |
| Vaginal Gaping Engages in (Sexual) | 2 | 1.95 | 2.14 |
| Afro Hair | 1 | 3.07 | 2.13 |
| Sex in Front of an Audience Engages in (Sexual) | 3 | 1.50 | 2.08 |
| Gang Rape Subject of (Sexual) | 2 | 1.89 | 2.08 |
| Double Handjob Engages in (Sexual) | 2 | 1.89 | 2.08 |
| Quickie Fix Engages in (Sexual) | 2 | 1.88 | 2.07 |
| Rhythmic Gymnastics Engages in | 1 | 2.97 | 2.06 |
| Sexual Blindfold Subject of (Sexual) | 2 | 1.86 | 2.04 |
| Twin Sister Role | 2 | 1.85 | 2.04 |
| Gynecologist Chair Subject of (Sexual) | 1 | 2.88 | 2.00 |
| Rape Engages in (Sexual) | 2 | 1.81 | 1.99 |
| Latex Thigh-high Boots Clothes | 1 | 2.86 | 1.98 |
| Anal Sex Engages in (Sexual) | 2 | 1.76 | 1.94 |
| Visible Cervix Penetration Subject of (Sexual) | 1 | 2.77 | 1.92 |
| Missionary Engages in (Sexual) | 2 | 1.74 | 1.91 |
| Arm Hair Hair | 1 | 2.73 | 1.89 |
| Coach Role | 1 | 2.71 | 1.88 |
| Chest Hair Hair | 1 | 2.70 | 1.87 |
| Outdoor Sex Engages in (Sexual) | 4 | 1.16 | 1.86 |
| Leather Bondage Subject of (Sexual) | 1 | 2.68 | 1.86 |
| Pubic Hair Hair | 3 | 1.34 | 1.85 |
| Doggy Style Engages in (Sexual) | 2 | 1.68 | 1.85 |
| Hair Pulling (Sexual) Subject of (Sexual) | 1 | 2.58 | 1.79 |
| Pervert Personality | 2 | 1.63 | 1.79 |
| Non-blood-related Father Role | 1 | 2.57 | 1.78 |
| Forced Public Nudity Subject of (Sexual) | 1 | 2.53 | 1.76 |
| Electric Shock (BDSM) Subject of (Sexual) | 1 | 2.53 | 1.75 |
| Sex in Public Places Engages in (Sexual) | 3 | 1.26 | 1.75 |
| Balding Hair | 1 | 2.43 | 1.69 |
| No Panties Clothes | 1 | 2.41 | 1.67 |
| Crotchless Panties Clothes | 1 | 2.41 | 1.67 |
| Open Cup Bra Clothes | 1 | 2.39 | 1.65 |
| Leotard Clothes | 1 | 2.39 | 1.65 |
| Group Sex of One Male and Several Females Engages in (Sexual) | 3 | 1.17 | 1.62 |
| Sailor School Uniform Clothes | 2 | 1.47 | 1.62 |
| Pissing Engages in (Sexual) | 2 | 1.47 | 1.61 |
| Clamps (BDSM) Subject of (Sexual) | 1 | 2.32 | 1.61 |
| Nipple Teasers Subject of (Sexual) | 1 | 2.26 | 1.57 |
| Netori (their SO is stolen) Subject of | 1 | 2.26 | 1.57 |
| Vaginal + Anal Object Insertion Subject of (Sexual) | 1 | 2.25 | 1.56 |
| High Heeled Boots Clothes | 1 | 2.24 | 1.55 |
| Necktie Clothes | 3 | 1.12 | 1.55 |
| Reverse Cowgirl Engages in (Sexual) | 1 | 2.22 | 1.54 |
| Blackmail Engages in | 1 | 2.22 | 1.54 |
| Pleated Skirt Clothes | 2 | 1.40 | 1.53 |
| Public Masturbation Engages in (Sexual) | 1 | 2.21 | 1.53 |
| High School Student Role | 5 | 0.85 | 1.53 |
| Scat Engages in (Sexual) | 1 | 2.19 | 1.52 |
| Seventh Posture Engages in (Sexual) | 1 | 2.19 | 1.52 |
| Sanpaku Eyes Eyes | 1 | 2.17 | 1.51 |
| Torture Subject of | 1 | 2.16 | 1.50 |
| Bukkake Subject of (Sexual) | 2 | 1.35 | 1.48 |
| Adult Body | 2 | 1.34 | 1.47 |
| Hidden Vibrator Subject of (Sexual) | 1 | 2.12 | 1.47 |
| Netorare (they are the stolen SO) Subject of | 1 | 2.11 | 1.47 |
| Suspension Bondage Subject of (Sexual) | 1 | 2.11 | 1.46 |
| Sports Uniform Clothes | 1 | 2.10 | 1.45 |
| Ahegao Engages in (Sexual) | 2 | 1.32 | 1.45 |
| Thick Eyebrows Hair | 1 | 2.06 | 1.43 |
| Cross Necklace Clothes | 1 | 2.05 | 1.42 |
| Sex on Toilet Engages in (Sexual) | 1 | 2.03 | 1.41 |
| Butterfly Engages in (Sexual) | 1 | 2.02 | 1.40 |
| Small Breast Sizes Body | 1 | 2.01 | 1.39 |
| Katana Items | 1 | 1.97 | 1.37 |
| Friend Role | 2 | 1.20 | 1.32 |
| Masturbation in front of an Audience Engages in (Sexual) | 1 | 1.90 | 1.32 |
| Anal Sex Subject of (Sexual) | 2 | 1.19 | 1.31 |
| Standing Sex Engages in (Sexual) | 1 | 1.87 | 1.29 |
| Boobjob Subject of (Sexual) | 1 | 1.86 | 1.29 |
| Boyfriend Role | 1 | 1.86 | 1.29 |
| Butterfly Subject of (Sexual) | 2 | 1.17 | 1.29 |
| Cunnilingus Subject of (Sexual) | 2 | 1.16 | 1.28 |
| Pink Rotor Subject of (Sexual) | 1 | 1.84 | 1.27 |
| Younger Appearance Body | 1 | 1.82 | 1.26 |
| Infidelity Engages in | 1 | 1.80 | 1.25 |
| Big Breasts Body | 2 | 1.13 | 1.24 |
| Braid Hair | 1 | 1.78 | 1.24 |
| Missionary Subject of (Sexual) | 2 | 1.12 | 1.23 |
| School Uniform Clothes | 4 | 0.76 | 1.22 |
| Handjob Subject of (Sexual) | 1 | 1.75 | 1.22 |
| Spit-roast Subject of (Sexual) | 1 | 1.75 | 1.21 |
| Quickie Fix Subject of (Sexual) | 2 | 1.08 | 1.19 |
| Cowgirl Engages in (Sexual) | 1 | 1.71 | 1.19 |
| Rope Bondage Subject of (Sexual) | 1 | 1.67 | 1.16 |
| Double Penetration (Group Sex) Subject of (Sexual) | 1 | 1.65 | 1.14 |
| Muscular Body | 1 | 1.64 | 1.14 |
| Reverse Cowgirl Subject of (Sexual) | 1 | 1.63 | 1.13 |
| Nail Polish Body | 1 | 1.62 | 1.13 |
| Vaginal Fingering Engages in (Sexual) | 1 | 1.61 | 1.12 |
| Sex at School Engages in (Sexual) | 1 | 1.55 | 1.07 |
| Girlfriend Role | 1 | 1.53 | 1.06 |
| Blowjob Subject of (Sexual) | 1 | 1.52 | 1.05 |
| Cowgirl Subject of (Sexual) | 2 | 0.95 | 1.05 |
| Choker Clothes | 1 | 1.50 | 1.04 |
| Incest Engages in (Sexual) | 1 | 1.47 | 1.02 |
| Doggy Style Subject of (Sexual) | 2 | 0.92 | 1.02 |
| Seventh Posture Subject of (Sexual) | 1 | 1.46 | 1.01 |
| Black Eyes | 1 | 1.42 | 0.98 |
| Masturbation Engages in (Sexual) | 1 | 1.40 | 0.97 |
| Hosome Eyes | 1 | 1.37 | 0.95 |
| Brown Hair | 3 | 0.68 | 0.95 |
| White Hair | 1 | 1.33 | 0.92 |
| T-shirt Clothes | 1 | 1.31 | 0.91 |
| Black Hair | 2 | 0.81 | 0.89 |
| Belt Clothes | 1 | 1.27 | 0.88 |
| Dress Clothes | 1 | 1.25 | 0.87 |
| Teen Body | 3 | 0.62 | 0.86 |
| Red Eyes | 1 | 1.20 | 0.83 |
| Long Hair | 2 | 0.75 | 0.82 |
| Trousers Clothes | 1 | 1.19 | 0.82 |
| Standing Sex Subject of (Sexual) | 1 | 1.18 | 0.81 |
| Twin Tails Hair | 1 | 1.13 | 0.78 |
| Tareme Eyes | 1 | 1.11 | 0.77 |
| Glasses Clothes | 1 | 1.08 | 0.75 |
| Vaginal Fingering Subject of (Sexual) | 1 | 1.08 | 0.75 |
| Boobjob Engages in (Sexual) | 1 | 1.07 | 0.74 |
| Miniskirt Clothes | 1 | 1.06 | 0.74 |
| Violet Eyes | 1 | 1.05 | 0.73 |
| Amber Eyes | 1 | 1.03 | 0.72 |
| Green Eyes | 1 | 1.02 | 0.71 |
| Short Hair | 2 | 0.61 | 0.67 |
| Shoulder-length Hair | 1 | 0.92 | 0.64 |
| Brown Eyes | 1 | 0.90 | 0.62 |
| Blond Hair | 1 | 0.89 | 0.62 |
| Virgin Sex Engages in (Sexual) | 1 | 0.85 | 0.59 |
| Waist Length+ Hair | 1 | 0.81 | 0.56 |
| Blue Eyes | 1 | 0.80 | 0.56 |
| Blowjob Engages in (Sexual) | 1 | 0.76 | 0.53 |
| Young-adult Body | 1 | 0.76 | 0.53 |
| Pale Body | 3 | 0.37 | 0.51 |
| Slim Body | 1 | 0.58 | 0.40 |