Main character's parents go overseas leaving him in charge of his sister for holidays. He wants to cheer his little sister up, but she urges him to fulfill old promise and treat her as an adult. These two weeks before her birthday get painted with the color of lust. [From vndbreview]
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Kyoudai ~Futari~ has not appeared in our Steam sample enough to calculate it's similar novels... sorry!
A novel needs atleast 20 owners before it's similarity is calculated.
| Name | Score | Importance | Weight |
|---|---|---|---|
| Group Sex Involving a Mix of Males, Females, and Gender Non-Conf | 2.00 | 3.65 | 7.31 |
| Male on Futanari | 2.50 | 2.50 | 6.24 |
| Futanari Heroine | 3.00 | 1.97 | 5.92 |
| Futanari on Futanari | 2.00 | 2.65 | 5.29 |
| School Nurse Support Character | 2.00 | 2.48 | 4.96 |
| Non-blood-related Brother/Sister Incest | 2.00 | 1.77 | 3.53 |
| Sex in Public Places | 2.00 | 1.09 | 2.18 |
| Sexual Content | 2.00 | 0.63 | 1.26 |
| Male Protagonist | 2.00 | 0.30 | 0.60 |
| ADV | 2.00 | 0.14 | 0.29 |
| Name | Characters | Importance | Weight |
|---|---|---|---|
| Group Sex Involving a Mix of Males, Females, and Gender Non-Conf Engages in (Sexual) | 3 | 3.85 | 5.34 |
| Sex in Library Engages in (Sexual) | 3 | 2.92 | 4.04 |
| School Literature Club Member Role | 2 | 3.02 | 3.32 |
| Vaginal + Anal Penetration Subject of (Sexual) | 3 | 2.29 | 3.18 |
| Frot Engages in (Sexual) | 2 | 2.71 | 2.97 |
| Group Sex of Several Males and at Least One Gender Non-Conformin Engages in (Sexual) | 1 | 4.26 | 2.95 |
| Agoraphobia Subject of | 1 | 3.96 | 2.74 |
| Penile Masturbation Engages in (Sexual) | 2 | 2.45 | 2.69 |
| Spit-roast Engages in (Sexual) | 2 | 2.44 | 2.68 |
| Masturbation in front of an Audience Engages in (Sexual) | 3 | 1.90 | 2.64 |
| Futanari Body | 2 | 2.36 | 2.59 |
| Missionary Engages in (Sexual) | 3 | 1.74 | 2.41 |
| Double Penetration (Group Sex) Engages in (Sexual) | 2 | 2.19 | 2.40 |
| Anal Object Insertion Subject of (Sexual) | 2 | 2.18 | 2.39 |
| Non-blood-related Incest Engages in (Sexual) | 2 | 2.15 | 2.37 |
| Adaptive Personality | 1 | 3.39 | 2.35 |
| Double-ended Dildo Subject of (Sexual) | 2 | 2.10 | 2.31 |
| Anilingus Subject of (Sexual) | 2 | 2.05 | 2.25 |
| Sex on Toilet Engages in (Sexual) | 2 | 2.03 | 2.23 |
| Rimming Handjob Subject of (Sexual) | 1 | 3.21 | 2.23 |
| Lesbian Sex Engages in (Sexual) | 4 | 1.38 | 2.22 |
| Nude Modeling Engages in | 1 | 3.13 | 2.17 |
| Sex at School Engages in (Sexual) | 3 | 1.55 | 2.15 |
| Ahegao Engages in (Sexual) | 4 | 1.32 | 2.13 |
| Mutual Masturbation Engages in (Sexual) | 2 | 1.94 | 2.13 |
| Blowjob Subject of (Sexual) | 3 | 1.52 | 2.11 |
| School Archery Club Member Role | 1 | 2.90 | 2.01 |
| Sitting Sex Engages in (Sexual) | 2 | 1.82 | 2.00 |
| Erotic Photography Subject of | 1 | 2.84 | 1.97 |
| Masturbation Engages in (Sexual) | 3 | 1.40 | 1.94 |
| Anal Sex Engages in (Sexual) | 2 | 1.76 | 1.94 |
| Handjob Subject of (Sexual) | 2 | 1.75 | 1.93 |
| Spit-roast Subject of (Sexual) | 2 | 1.75 | 1.92 |
| Step Brother Role | 1 | 2.74 | 1.90 |
| Hikikomori Role | 1 | 2.73 | 1.89 |
| Twin Boobjob Subject of (Sexual) | 1 | 2.68 | 1.86 |
| Doggy Style Engages in (Sexual) | 2 | 1.68 | 1.85 |
| Vaginal Masturbation Engages in (Sexual) | 2 | 1.67 | 1.84 |
| Double Penetration (Group Sex) Subject of (Sexual) | 2 | 1.65 | 1.81 |
| Piledriver Engages in (Sexual) | 1 | 2.55 | 1.77 |
| Sex in Public Places Engages in (Sexual) | 3 | 1.26 | 1.75 |
| Sixty-nine Engages in (Sexual) | 3 | 1.26 | 1.75 |
| Wooden Horse Subject of (Sexual) | 1 | 2.51 | 1.74 |
| Non-blood-related Son Role | 1 | 2.49 | 1.72 |
| Sex in Water Engages in (Sexual) | 2 | 1.56 | 1.72 |
| School Nurse Role | 1 | 2.46 | 1.71 |
| Sex Friend Role | 1 | 2.44 | 1.69 |
| Step Sister Role | 1 | 2.43 | 1.69 |
| Sex in Front of an Audience Engages in (Sexual) | 2 | 1.50 | 1.65 |
| Non-blood-related Brother Role | 1 | 2.38 | 1.65 |
| Reverse Missionary Engages in (Sexual) | 1 | 2.36 | 1.63 |
| Non-blood-related Daughter Role | 1 | 2.35 | 1.63 |
| Wax Play Subject of (Sexual) | 1 | 2.35 | 1.63 |
| Butterfly Subject of (Sexual) | 3 | 1.17 | 1.63 |
| Peace Sign Ahegao Engages in (Sexual) | 1 | 2.33 | 1.61 |
| Spoiled Personality | 1 | 2.32 | 1.61 |
| Handjob Engages in (Sexual) | 3 | 1.16 | 1.60 |
| Nymphomania Subject of | 1 | 2.31 | 1.60 |
| Mirror Sex Engages in (Sexual) | 1 | 2.31 | 1.60 |
| Rope Bondage Harness Clothes | 1 | 2.29 | 1.59 |
| Twin Blowjob Engages in (Sexual) | 2 | 1.45 | 1.59 |
| Anal Plug Tail Subject of (Sexual) | 1 | 2.29 | 1.59 |
| Obedient Personality | 1 | 2.29 | 1.58 |
| Class President Role | 1 | 2.28 | 1.58 |
| Bondage Sex Engages in (Sexual) | 1 | 2.28 | 1.58 |
| Reverse Cowgirl Engages in (Sexual) | 1 | 2.22 | 1.54 |
| Spoons Engages in (Sexual) | 1 | 2.21 | 1.53 |
| Bathroom Sex Engages in (Sexual) | 2 | 1.39 | 1.52 |
| Promiscuous Personality | 1 | 2.19 | 1.52 |
| Non-blood-related Sister Role | 1 | 2.17 | 1.50 |
| Sundress Clothes | 1 | 2.14 | 1.49 |
| Bukkake Subject of (Sexual) | 2 | 1.35 | 1.48 |
| Shimapan Clothes | 1 | 2.14 | 1.48 |
| Voyeurism Engages in (Sexual) | 1 | 2.14 | 1.48 |
| Mouth Gag Subject of (Sexual) | 1 | 2.14 | 1.48 |
| Flustered Personality | 1 | 2.12 | 1.47 |
| Petplay Subject of (Sexual) | 1 | 2.11 | 1.46 |
| Waitstaff Uniform Clothes | 1 | 2.06 | 1.43 |
| Brother Complex Personality | 1 | 2.06 | 1.43 |
| Kind Personality | 3 | 1.03 | 1.42 |
| Anal Fingering Engages in (Sexual) | 1 | 2.05 | 1.42 |
| Rival Role | 1 | 2.03 | 1.41 |
| Butterfly Engages in (Sexual) | 1 | 2.02 | 1.40 |
| Anal Beads Subject of (Sexual) | 1 | 2.01 | 1.39 |
| Anilingus Engages in (Sexual) | 1 | 2.01 | 1.39 |
| Vaginal Object Insertion Subject of (Sexual) | 1 | 1.99 | 1.38 |
| High School Student Role | 4 | 0.85 | 1.37 |
| Blowjob Engages in (Sexual) | 5 | 0.76 | 1.36 |
| Vibrator Subject of (Sexual) | 1 | 1.97 | 1.36 |
| Selfish Personality | 1 | 1.96 | 1.36 |
| Voyeurism Subject of (Sexual) | 1 | 1.95 | 1.35 |
| Piledriver Subject of (Sexual) | 1 | 1.94 | 1.35 |
| Bisexual Role | 1 | 1.94 | 1.35 |
| Assertive Personality | 1 | 1.94 | 1.34 |
| Cowgirl Subject of (Sexual) | 3 | 0.95 | 1.32 |
| Tanned Body | 1 | 1.90 | 1.32 |
| Double Handjob Engages in (Sexual) | 1 | 1.89 | 1.31 |
| Anal Sex Subject of (Sexual) | 2 | 1.19 | 1.31 |
| Quickie Fix Engages in (Sexual) | 1 | 1.88 | 1.30 |
| Jealous Personality | 1 | 1.87 | 1.30 |
| Standing Sex Engages in (Sexual) | 1 | 1.87 | 1.29 |
| Twin Braids Hair | 1 | 1.87 | 1.29 |
| Timid Personality | 1 | 1.86 | 1.29 |
| Boobjob Subject of (Sexual) | 1 | 1.86 | 1.29 |
| Group Sex of One Male and Several Females Engages in (Sexual) | 2 | 1.17 | 1.29 |
| Outdoor Sex Engages in (Sexual) | 2 | 1.16 | 1.27 |
| Blunt Personality | 1 | 1.83 | 1.27 |
| Homosexual Role | 1 | 1.83 | 1.27 |
| Waitstaff Role | 1 | 1.82 | 1.26 |
| Hidden Eyes | 1 | 1.80 | 1.25 |
| Lab Coat Clothes | 1 | 1.79 | 1.24 |
| Missionary Subject of (Sexual) | 2 | 1.12 | 1.23 |
| Necktie Clothes | 2 | 1.12 | 1.23 |
| Teal Eyes | 1 | 1.72 | 1.20 |
| Mischievous Personality | 1 | 1.72 | 1.20 |
| Outgoing Personality | 1 | 1.72 | 1.19 |
| Quickie Fix Subject of (Sexual) | 2 | 1.08 | 1.19 |
| Cowgirl Engages in (Sexual) | 1 | 1.71 | 1.19 |
| Reserved Personality | 1 | 1.71 | 1.19 |
| Anal Fingering Subject of (Sexual) | 1 | 1.71 | 1.19 |
| Virgin Sex Engages in (Sexual) | 3 | 0.85 | 1.18 |
| Hoodie Clothes | 1 | 1.70 | 1.18 |
| Nipple Sucking Engages in (Sexual) | 1 | 1.70 | 1.18 |
| Boobjob Engages in (Sexual) | 2 | 1.07 | 1.17 |
| Sitting Sex Subject of (Sexual) | 2 | 1.06 | 1.17 |
| Rope Bondage Subject of (Sexual) | 1 | 1.67 | 1.16 |
| Spoons Subject of (Sexual) | 1 | 1.67 | 1.16 |
| Small Breasts Body | 1 | 1.65 | 1.15 |
| Sweater Clothes | 1 | 1.63 | 1.13 |
| Kouhai Role | 1 | 1.63 | 1.13 |
| Reverse Cowgirl Subject of (Sexual) | 1 | 1.63 | 1.13 |
| Shy Personality | 1 | 1.62 | 1.12 |
| Garter Belt Stockings Clothes | 1 | 1.62 | 1.12 |
| Lactation Engages in | 1 | 1.59 | 1.10 |
| Bondage Sex Subject of (Sexual) | 1 | 1.58 | 1.10 |
| Mole Body | 1 | 1.58 | 1.09 |
| Jeans Clothes | 1 | 1.55 | 1.08 |
| Cunnilingus Engages in (Sexual) | 1 | 1.55 | 1.07 |
| Sex while Being Pregnant Engages in (Sexual) | 1 | 1.53 | 1.06 |
| Makeup Body | 1 | 1.53 | 1.06 |
| Energetic Personality | 1 | 1.52 | 1.05 |
| School Uniform Clothes | 3 | 0.76 | 1.05 |
| Maid's Dress Clothes | 1 | 1.51 | 1.05 |
| Choker Clothes | 1 | 1.50 | 1.04 |
| Serious Personality | 1 | 1.49 | 1.03 |
| Sailor School Uniform Clothes | 1 | 1.47 | 1.02 |
| Pissing Engages in (Sexual) | 1 | 1.47 | 1.02 |
| Doggy Style Subject of (Sexual) | 2 | 0.92 | 1.02 |
| Blouse Clothes | 1 | 1.46 | 1.01 |
| Shoulder-length Hair | 2 | 0.92 | 1.01 |
| Headband Clothes | 1 | 1.45 | 1.01 |
| Black Eyes | 1 | 1.42 | 0.98 |
| Cooking Engages in | 1 | 1.42 | 0.98 |
| Knee-high Socks Clothes | 1 | 1.38 | 0.96 |
| Nipple Sucking Subject of (Sexual) | 1 | 1.38 | 0.96 |
| Tominagi Subject of (Sexual) | 1 | 1.36 | 0.94 |
| Skirt Clothes | 1 | 1.34 | 0.93 |
| Black Hair | 2 | 0.81 | 0.89 |
| Parted in Middle Hair | 1 | 1.25 | 0.87 |
| Classmate Role | 1 | 1.23 | 0.85 |
| Friendly Personality | 1 | 1.22 | 0.84 |
| Violet Hair | 1 | 1.20 | 0.83 |
| Ribbon Hair Tie Clothes | 1 | 1.19 | 0.83 |
| Long Hair | 2 | 0.75 | 0.82 |
| Standing Sex Subject of (Sexual) | 1 | 1.18 | 0.81 |
| Cunnilingus Subject of (Sexual) | 1 | 1.16 | 0.81 |
| Twin Tails Hair | 1 | 1.13 | 0.78 |
| Big Breasts Body | 1 | 1.13 | 0.78 |
| Brown Hair | 2 | 0.68 | 0.75 |
| Glasses Clothes | 1 | 1.08 | 0.75 |
| Miniskirt Clothes | 1 | 1.06 | 0.74 |
| Violet Eyes | 1 | 1.05 | 0.73 |
| Thigh-high Stockings Clothes | 1 | 1.04 | 0.72 |
| Spiky Bangs Hair | 1 | 1.00 | 0.69 |
| Brown Eyes | 1 | 0.90 | 0.62 |
| 1 | 0.00 | 0.00 |