This summer is different from previous ones, not only the temparature but also my mind and body. Shintaro has a beautiful mother and pretty younger sister who have been living with him. But this summer is somehow different.... One day, when he enters a bathroom to have a bath, there is a sister, Tomoe. She gives a shriek and runs away. This is the first time for him to see his sister as a woman. And when he soaks in a bath, Tomoe comes in to apologize for what she did to him and she says she will wash his back.... [From ErogeShop]
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| Name | Characters | Importance | Weight |
|---|---|---|---|
| Group Sex of One Female and Several Males Engages in (Sexual) | 5 | 1.70 | 3.04 |
| Incest Engages in (Sexual) | 6 | 1.47 | 2.86 |
| Lesbian Sex Engages in (Sexual) | 6 | 1.38 | 2.68 |
| Cyan Eyes | 4 | 1.67 | 2.68 |
| Non-blood-related Incest Engages in (Sexual) | 2 | 2.15 | 2.37 |
| Mouth Gag Subject of (Sexual) | 2 | 2.14 | 2.35 |
| Rope Bondage Subject of (Sexual) | 3 | 1.67 | 2.32 |
| Cooking Engages in | 4 | 1.42 | 2.28 |
| Group Sex of One Male and Several Females Engages in (Sexual) | 6 | 1.17 | 2.28 |
| Mother-in-law Role | 1 | 3.17 | 2.20 |
| Pubic Hair Hair | 4 | 1.34 | 2.15 |
| Group Sex of Multiple Females and Males Engages in (Sexual) | 2 | 1.91 | 2.10 |
| Body Painting Body | 1 | 3.02 | 2.09 |
| Wax Play Engages in (Sexual) | 1 | 2.99 | 2.07 |
| Headscarf Clothes | 1 | 2.95 | 2.04 |
| Mother Role | 3 | 1.46 | 2.02 |
| Daughter Role | 3 | 1.46 | 2.02 |
| Earrings Clothes | 3 | 1.42 | 1.97 |
| Leg Warmers Clothes | 1 | 2.82 | 1.96 |
| Body Food Engages in (Sexual) | 1 | 2.82 | 1.96 |
| Bun Hair | 2 | 1.77 | 1.94 |
| Vaginal/Anal Sexual Toys Subject of (Sexual) | 2 | 1.74 | 1.91 |
| Pet Collar Clothes | 1 | 2.72 | 1.89 |
| Sister-in-law Role | 1 | 2.66 | 1.84 |
| Reverse Piledriver Subject of (Sexual) | 1 | 2.65 | 1.84 |
| Nail Polish Body | 2 | 1.62 | 1.78 |
| Band-aid Clothes | 1 | 2.51 | 1.74 |
| Bondage Sex Subject of (Sexual) | 2 | 1.58 | 1.74 |
| Big Breast Sizes Body | 2 | 1.56 | 1.71 |
| Cunnilingus Engages in (Sexual) | 2 | 1.55 | 1.70 |
| Homeroom Teacher Role | 1 | 2.45 | 1.70 |
| Slit Dress Clothes | 1 | 2.45 | 1.70 |
| Wax Play Subject of (Sexual) | 1 | 2.35 | 1.63 |
| Cunnilingus Subject of (Sexual) | 3 | 1.16 | 1.61 |
| Transparent Clothes | 1 | 2.31 | 1.60 |
| Housewife Role | 1 | 2.31 | 1.60 |
| Divorcee Role | 1 | 2.31 | 1.60 |
| Twin Blowjob Engages in (Sexual) | 2 | 1.45 | 1.59 |
| Anal Plug Tail Subject of (Sexual) | 1 | 2.29 | 1.59 |
| Nightgown Clothes | 1 | 2.28 | 1.58 |
| Hairpin Clothes | 2 | 1.40 | 1.54 |
| Sexual Masochism Engages in (Sexual) | 1 | 2.22 | 1.54 |
| Blunt Bangs Hair | 2 | 1.40 | 1.54 |
| Tareme Eyes | 3 | 1.11 | 1.53 |
| Pissing Subject of (Sexual) | 1 | 2.18 | 1.51 |
| Whipping (BDSM) Subject of (Sexual) | 1 | 2.16 | 1.50 |
| Miniskirt Clothes | 3 | 1.06 | 1.47 |
| Hidden Vibrator Subject of (Sexual) | 1 | 2.12 | 1.47 |
| Tribadism Engages in (Sexual) | 1 | 2.11 | 1.46 |
| Petplay Subject of (Sexual) | 1 | 2.11 | 1.46 |
| Honor Student Role | 1 | 2.09 | 1.45 |
| Inflated Belly Subject of (Sexual) | 1 | 2.04 | 1.42 |
| Enema Subject of (Sexual) | 1 | 2.02 | 1.40 |
| Towel Clothes | 1 | 2.01 | 1.40 |
| Ringlet Hair | 1 | 2.00 | 1.39 |
| Spiky Bangs Hair | 3 | 1.00 | 1.38 |
| Neighbor Role | 1 | 1.99 | 1.38 |
| Cleaning Engages in | 1 | 1.99 | 1.38 |
| Turtleneck Shirt Clothes | 1 | 1.98 | 1.38 |
| Piledriver Subject of (Sexual) | 1 | 1.94 | 1.35 |
| Sandals Clothes | 1 | 1.93 | 1.34 |
| Blue Hair | 2 | 1.19 | 1.31 |
| Ribbon Hair Tie Clothes | 2 | 1.19 | 1.31 |
| Naked Apron Clothes | 1 | 1.88 | 1.30 |
| Yukata Clothes | 1 | 1.85 | 1.28 |
| Puffy Sleeves Clothes | 1 | 1.85 | 1.28 |
| Shirt Clothes | 2 | 1.16 | 1.27 |
| Bob Cut Hair | 1 | 1.82 | 1.26 |
| Blowjob Engages in (Sexual) | 4 | 0.76 | 1.22 |
| Young-adult Body | 4 | 0.76 | 1.22 |
| Pajamas Clothes | 1 | 1.75 | 1.21 |
| Skirt Suit Clothes | 1 | 1.74 | 1.21 |
| Glasses Clothes | 2 | 1.08 | 1.19 |
| Boobjob Engages in (Sexual) | 2 | 1.07 | 1.17 |
| Intake Hair | 1 | 1.68 | 1.16 |
| Garnet Eyes | 1 | 1.66 | 1.15 |
| Double Penetration (Group Sex) Subject of (Sexual) | 1 | 1.65 | 1.14 |
| Relaxed Personality | 1 | 1.64 | 1.13 |
| Mini-dress Clothes | 1 | 1.64 | 1.13 |
| Pervert Personality | 1 | 1.63 | 1.13 |
| Slim Body | 6 | 0.58 | 1.12 |
| Garter Belt Stockings Clothes | 1 | 1.62 | 1.12 |
| Bracelet Clothes | 1 | 1.56 | 1.08 |
| Makeup Body | 1 | 1.53 | 1.06 |
| Necklace Clothes | 1 | 1.50 | 1.04 |
| Straight Hair | 2 | 0.94 | 1.04 |
| Student Role | 1 | 1.49 | 1.03 |
| Blouse Clothes | 1 | 1.46 | 1.01 |
| Shoulder-length Hair | 2 | 0.92 | 1.01 |
| Pantyhose Clothes | 1 | 1.43 | 0.99 |
| Bathroom Sex Engages in (Sexual) | 1 | 1.39 | 0.96 |
| Skirt Clothes | 1 | 1.34 | 0.93 |
| Childhood Friend Role | 1 | 1.26 | 0.87 |
| Dress Clothes | 1 | 1.25 | 0.87 |
| Ribbon Tie Clothes | 1 | 1.25 | 0.87 |
| Parted in Middle Hair | 1 | 1.25 | 0.87 |
| Violet Hair | 1 | 1.20 | 0.83 |
| Handjob Engages in (Sexual) | 1 | 1.16 | 0.80 |
| Twin Tails Hair | 1 | 1.13 | 0.78 |
| Ponytail Hair | 1 | 1.10 | 0.76 |
| Brown Hair | 2 | 0.68 | 0.75 |
| Quickie Fix Subject of (Sexual) | 1 | 1.08 | 0.75 |
| Amber Eyes | 1 | 1.03 | 0.72 |
| Pale Body | 6 | 0.37 | 0.71 |
| Kind Personality | 1 | 1.03 | 0.71 |
| Teen Body | 2 | 0.62 | 0.68 |
| Sidehair Hair | 1 | 0.98 | 0.68 |
| Cowgirl Subject of (Sexual) | 1 | 0.95 | 0.66 |
| Doggy Style Subject of (Sexual) | 1 | 0.92 | 0.64 |
| Blond Hair | 1 | 0.89 | 0.62 |
| Black Hair | 1 | 0.81 | 0.56 |
| School Uniform Clothes | 1 | 0.76 | 0.52 |
| Long Hair | 1 | 0.75 | 0.52 |
| Short Hair | 1 | 0.61 | 0.42 |