Kazumi Kohinata is a major siscon for his younger sister Yuzu and her childhood friend Minatsu who calls him Kazu-nii and treats him as an elder brother despite their lack of family ties. One day his father announces that he and Kazumi's mother will be going to Las Vegas for a week along with Minatsu's parents and he must take care of both girls alone. Kazumi now has one week to get Yuzu and Minatsu to fall madly in love with him.
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| Name | Characters | Importance | Weight |
|---|---|---|---|
| Zouri Clothes | 2 | 2.38 | 2.62 |
| Ballet Engages in | 1 | 3.42 | 2.37 |
| Tribadism on Penis Engages in (Sexual) | 2 | 2.08 | 2.28 |
| Cuffs Clothes | 2 | 2.03 | 2.24 |
| Cosplay Engages in | 2 | 1.93 | 2.12 |
| Yukata Clothes | 2 | 1.86 | 2.04 |
| Ballerina Shoes Clothes | 1 | 2.93 | 2.03 |
| Intercrural Sex Engages in (Sexual) | 2 | 1.83 | 2.01 |
| Evening Gloves Clothes | 2 | 1.82 | 2.00 |
| Leg Warmers Clothes | 1 | 2.82 | 1.95 |
| Hair Flower Clothes | 2 | 1.77 | 1.95 |
| Strapless Leotard Clothes | 1 | 2.66 | 1.84 |
| Maid's Headdress Clothes | 2 | 1.63 | 1.79 |
| Imouto Act Role | 1 | 2.58 | 1.79 |
| Elementary School Student Role | 1 | 2.53 | 1.75 |
| Clothing with Ribbons Clothes | 2 | 1.59 | 1.74 |
| Kimono Clothes | 2 | 1.57 | 1.73 |
| Group Sex Engages in (Sexual) | 2 | 1.55 | 1.70 |
| Stockings Clothes | 1 | 2.44 | 1.69 |
| Maid's Dress Clothes | 2 | 1.51 | 1.66 |
| Sister Complex Personality | 1 | 2.38 | 1.65 |
| Incest Engages in (Sexual) | 2 | 1.47 | 1.61 |
| Twin Blowjob Engages in (Sexual) | 2 | 1.45 | 1.59 |
| Masturbation Engages in (Sexual) | 2 | 1.41 | 1.54 |
| Torn Pantyhose (damaged) Clothes | 1 | 2.21 | 1.53 |
| Lesbian Sex Engages in (Sexual) | 2 | 1.38 | 1.52 |
| Kid Body | 2 | 1.38 | 1.51 |
| Bukkake Subject of (Sexual) | 2 | 1.35 | 1.49 |
| Shimapan Clothes | 1 | 2.14 | 1.48 |
| Skirt Clothes | 2 | 1.34 | 1.47 |
| Third Person Personality | 1 | 2.11 | 1.46 |
| Old Type School Swimsuit Clothes | 1 | 2.10 | 1.45 |
| Brother Complex Personality | 1 | 2.06 | 1.43 |
| Bow Tie Clothes | 1 | 2.05 | 1.42 |
| Flat Chest Body | 1 | 2.04 | 1.42 |
| Dress Shoes Clothes | 1 | 2.01 | 1.40 |
| Ringlet Hair | 1 | 2.00 | 1.39 |
| Sex in Public Places Engages in (Sexual) | 2 | 1.26 | 1.38 |
| Swimming Engages in | 1 | 1.95 | 1.36 |
| Full Brother Role | 1 | 1.95 | 1.35 |
| Piledriver Subject of (Sexual) | 1 | 1.94 | 1.34 |
| Mutual Masturbation Engages in (Sexual) | 1 | 1.94 | 1.34 |
| Unusual Hair Ornaments Clothes | 1 | 1.88 | 1.31 |
| Outdoor Sex Engages in (Sexual) | 2 | 1.16 | 1.27 |
| Bra Clothes | 1 | 1.83 | 1.27 |
| Hidden Eyes | 1 | 1.79 | 1.24 |
| Bun Hair | 1 | 1.77 | 1.22 |
| Side Tail Hair | 1 | 1.75 | 1.21 |
| Reverse Missionary Subject of (Sexual) | 1 | 1.74 | 1.20 |
| Older Brother Role | 1 | 1.73 | 1.20 |
| Quickie Fix Subject of (Sexual) | 2 | 1.08 | 1.19 |
| Virgin Sex Engages in (Sexual) | 3 | 0.85 | 1.19 |
| Naive Personality | 1 | 1.69 | 1.17 |
| Sitting Sex Subject of (Sexual) | 2 | 1.06 | 1.17 |
| Shorts Clothes | 1 | 1.68 | 1.16 |
| Thigh-high Stockings Clothes | 2 | 1.05 | 1.15 |
| Crop Top Clothes | 1 | 1.65 | 1.15 |
| Mini-dress Clothes | 1 | 1.64 | 1.14 |
| Lactation Engages in | 1 | 1.59 | 1.10 |
| Apron Clothes | 1 | 1.59 | 1.10 |
| Sex in Water Engages in (Sexual) | 1 | 1.56 | 1.08 |
| Full Sister Role | 1 | 1.56 | 1.08 |
| Sidehair Hair | 2 | 0.98 | 1.08 |
| Cunnilingus Engages in (Sexual) | 1 | 1.55 | 1.07 |
| Sex at School Engages in (Sexual) | 1 | 1.54 | 1.07 |
| Cowgirl Subject of (Sexual) | 2 | 0.96 | 1.05 |
| Choker Clothes | 1 | 1.50 | 1.04 |
| Pissing Engages in (Sexual) | 1 | 1.47 | 1.02 |
| Younger Sister Role | 1 | 1.45 | 1.00 |
| Pantyhose Clothes | 1 | 1.43 | 0.99 |
| Earrings Clothes | 1 | 1.42 | 0.99 |
| Hairpin Clothes | 1 | 1.41 | 0.97 |
| Hair Tie Clothes | 1 | 1.40 | 0.97 |
| Tank Top Clothes | 1 | 1.40 | 0.97 |
| Blunt Bangs Hair | 1 | 1.39 | 0.97 |
| Bathroom Sex Engages in (Sexual) | 1 | 1.38 | 0.96 |
| Tominagi Subject of (Sexual) | 1 | 1.35 | 0.94 |
| Female Ejaculation Engages in (Sexual) | 1 | 1.35 | 0.94 |
| Parted in Middle Hair | 1 | 1.24 | 0.86 |
| Blowjob Engages in (Sexual) | 2 | 0.76 | 0.84 |
| Ribbon Hair Tie Clothes | 1 | 1.20 | 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 |
| Twin Tails Hair | 1 | 1.14 | 0.79 |
| Vaginal Fingering Subject of (Sexual) | 1 | 1.08 | 0.75 |
| Amber Eyes | 1 | 1.03 | 0.72 |
| Doggy Style Subject of (Sexual) | 1 | 0.93 | 0.64 |
| Shoulder-length Hair | 1 | 0.92 | 0.64 |
| Slim Body | 2 | 0.57 | 0.63 |
| Blond Hair | 1 | 0.89 | 0.62 |
| Blue Eyes | 1 | 0.81 | 0.56 |
| Black Hair | 1 | 0.80 | 0.56 |
| Young-adult Body | 1 | 0.75 | 0.52 |
| Brown Hair | 1 | 0.69 | 0.48 |
| Short Hair | 1 | 0.61 | 0.42 |
| Pale Body | 2 | 0.37 | 0.40 |