Yuya lives with his father and mother. He enjoys his life with Kazuki, his close friend. But one day, Yuya sees his mother, Mizuho, and Kazuki having sex.... Days later, Chihiro, Mizuho's younger sister, visits his house. His evil desire arises and puts some medicine into a coffee he has just served to her.... [From ErogeShop]
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| Name | Characters | Importance | Weight |
|---|---|---|---|
| Open Cup Baby-doll Clothes | 1 | 3.29 | 2.28 |
| Rape Involving Drugs Subject of (Sexual) | 1 | 2.86 | 1.98 |
| Sexual Slavery (Consensual) Subject of (Sexual) | 1 | 2.79 | 1.93 |
| Pubic Hair Shaving Subject of (Sexual) | 1 | 2.61 | 1.81 |
| Sling Bikini Clothes | 1 | 2.61 | 1.81 |
| Cheerleading Uniform Clothes | 1 | 2.61 | 1.81 |
| Nephew Role | 1 | 2.55 | 1.77 |
| Office Lady Role | 1 | 2.48 | 1.72 |
| Full Sister Role | 2 | 1.56 | 1.71 |
| Mole Body | 2 | 1.56 | 1.71 |
| Trench Coat Clothes | 1 | 2.46 | 1.71 |
| Rape by Protagonist Only Subject of (Sexual) | 1 | 2.40 | 1.66 |
| Aunt Role | 1 | 2.37 | 1.64 |
| Reverse Missionary Engages in (Sexual) | 1 | 2.35 | 1.63 |
| Incest Engages in (Sexual) | 2 | 1.47 | 1.61 |
| Hidden Vibrator Subject of (Sexual) | 1 | 2.12 | 1.47 |
| Pubic Hair Hair | 2 | 1.34 | 1.47 |
| Petplay Subject of (Sexual) | 1 | 2.11 | 1.46 |
| Tominagi Engages in (Sexual) | 1 | 2.10 | 1.46 |
| Being Drugged Subject of | 1 | 2.05 | 1.42 |
| Sixty-nine Engages in (Sexual) | 2 | 1.26 | 1.39 |
| Sex with Others Engages in (Sexual) | 1 | 1.99 | 1.38 |
| Facesitting Engages in (Sexual) | 1 | 1.96 | 1.36 |
| Multiple Penetration Subject of (Sexual) | 1 | 1.91 | 1.32 |
| Friend Role | 2 | 1.20 | 1.32 |
| Naked Apron Clothes | 1 | 1.88 | 1.30 |
| Trousers Clothes | 2 | 1.18 | 1.29 |
| Standing Sex Engages in (Sexual) | 1 | 1.86 | 1.29 |
| Shirt Clothes | 2 | 1.16 | 1.27 |
| Sitting Sex Engages in (Sexual) | 1 | 1.82 | 1.26 |
| Rape Engages in (Sexual) | 1 | 1.81 | 1.26 |
| Son Role | 1 | 1.81 | 1.26 |
| Infidelity Engages in | 1 | 1.79 | 1.24 |
| Necktie Clothes | 2 | 1.12 | 1.23 |
| Big Breasts Body | 2 | 1.10 | 1.21 |
| Skirt Suit Clothes | 1 | 1.74 | 1.21 |
| Reverse Missionary Subject of (Sexual) | 1 | 1.74 | 1.20 |
| Cowgirl Engages in (Sexual) | 1 | 1.71 | 1.19 |
| Shorts Clothes | 1 | 1.68 | 1.16 |
| Rope Bondage Subject of (Sexual) | 1 | 1.68 | 1.16 |
| Sex with Protagonist Only Engages in (Sexual) | 1 | 1.67 | 1.15 |
| Amber Eyes | 2 | 1.03 | 1.14 |
| Pink Eyes | 1 | 1.63 | 1.13 |
| Garter Belt Stockings Clothes | 1 | 1.62 | 1.12 |
| Apron Clothes | 1 | 1.59 | 1.10 |
| Older Sister Role | 1 | 1.56 | 1.08 |
| Cunnilingus Engages in (Sexual) | 1 | 1.55 | 1.07 |
| Wife Role | 1 | 1.52 | 1.06 |
| Blowjob Subject of (Sexual) | 1 | 1.52 | 1.05 |
| Cowgirl Subject of (Sexual) | 2 | 0.96 | 1.05 |
| Sailor School Uniform Clothes | 1 | 1.48 | 1.02 |
| Pissing Engages in (Sexual) | 1 | 1.47 | 1.02 |
| Mother Role | 1 | 1.46 | 1.01 |
| Younger Sister Role | 1 | 1.45 | 1.00 |
| Masturbation Engages in (Sexual) | 1 | 1.41 | 0.97 |
| Not a Virgin Role | 1 | 1.40 | 0.97 |
| Bathroom Sex Engages in (Sexual) | 1 | 1.38 | 0.96 |
| High School Student Role | 2 | 0.86 | 0.95 |
| Tominagi Subject of (Sexual) | 1 | 1.35 | 0.94 |
| Female Ejaculation Engages in (Sexual) | 1 | 1.35 | 0.94 |
| Skirt Clothes | 1 | 1.34 | 0.93 |
| Ahoge Hair | 1 | 1.33 | 0.92 |
| Ahegao Engages in (Sexual) | 1 | 1.32 | 0.91 |
| T-shirt Clothes | 1 | 1.31 | 0.91 |
| Black Hair | 2 | 0.80 | 0.88 |
| Sex in Public Places Engages in (Sexual) | 1 | 1.26 | 0.87 |
| Short Hair | 3 | 0.61 | 0.84 |
| Young-adult Body | 2 | 0.75 | 0.83 |
| Anal Sex Subject of (Sexual) | 1 | 1.19 | 0.82 |
| Standing Sex Subject of (Sexual) | 1 | 1.18 | 0.81 |
| Butterfly Subject of (Sexual) | 1 | 1.17 | 0.81 |
| Cunnilingus Subject of (Sexual) | 1 | 1.16 | 0.80 |
| Outdoor Sex Engages in (Sexual) | 1 | 1.16 | 0.80 |
| Handjob Engages in (Sexual) | 1 | 1.15 | 0.80 |
| Missionary Subject of (Sexual) | 1 | 1.12 | 0.78 |
| Brown Hair | 2 | 0.69 | 0.75 |
| Quickie Fix Subject of (Sexual) | 1 | 1.08 | 0.75 |
| Boobjob Engages in (Sexual) | 1 | 1.07 | 0.74 |
| Sitting Sex Subject of (Sexual) | 1 | 1.06 | 0.74 |
| Violet Eyes | 1 | 1.05 | 0.73 |
| Teen Body | 2 | 0.62 | 0.68 |
| Doggy Style Subject of (Sexual) | 1 | 0.93 | 0.64 |
| Virgin Sex Engages in (Sexual) | 1 | 0.86 | 0.59 |
| Blowjob Engages in (Sexual) | 1 | 0.76 | 0.53 |
| Long Hair | 1 | 0.75 | 0.52 |