The protagonist, Nakashimizu Hiro, goes back to his home when summer vacation begins. He is a university student who is seen as serious but well-liked by people around him. As a consequence, he's been trusted to teach as a private tutor for his cousin Hikaru and his childhood friend Rina, who actually have secret feeling for him. This also applies to his friend’s little sister Manami who often come to his house. His little sister Sana also respects him very much. Yet, he never dates any of them, or even had a girlfriend for once. The reason is that he actually has a secret he takes to the grave: he likes getting approached by assertive, younger girls. However, one day the girls find out about his fetish in an accident! And now all the girls who were previously meek become aggressive towards him, including his little sister!? What will happen to his life from now on…
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| Name | Characters | Importance | Weight |
|---|---|---|---|
| Gokkun Engages in (Sexual) | 5 | 2.04 | 3.66 |
| Sex in Front of an Audience Engages in (Sexual) | 7 | 1.50 | 3.12 |
| Imouto Act Role | 2 | 2.59 | 2.84 |
| Nipple Teasing Engages in (Sexual) | 3 | 2.01 | 2.79 |
| Face-farting Subject of (Sexual) | 1 | 4.02 | 2.79 |
| Seventh Posture Subject of (Sexual) | 5 | 1.46 | 2.62 |
| Intercrural Sex Engages in (Sexual) | 3 | 1.84 | 2.56 |
| Group Sex of One Male and Several Females Engages in (Sexual) | 7 | 1.17 | 2.43 |
| Bukkake Subject of (Sexual) | 5 | 1.35 | 2.42 |
| Milking (Sexual) Subject of (Sexual) | 2 | 2.20 | 2.42 |
| Deredere Personality | 3 | 1.74 | 2.42 |
| French Kiss Engages in (Sexual) | 4 | 1.48 | 2.38 |
| Ahegao Engages in (Sexual) | 5 | 1.32 | 2.37 |
| Incest Engages in (Sexual) | 4 | 1.47 | 2.36 |
| Henpecked Personality | 1 | 3.38 | 2.34 |
| Female Ejaculation Engages in (Sexual) | 4 | 1.36 | 2.19 |
| Tominagi Subject of (Sexual) | 4 | 1.36 | 2.18 |
| Sex in Water Engages in (Sexual) | 3 | 1.56 | 2.17 |
| Pantyjob Subject of (Sexual) | 1 | 3.07 | 2.13 |
| Cousin Role | 2 | 1.88 | 2.06 |
| Blouse Clothes | 3 | 1.46 | 2.03 |
| Romantically Indecisive Personality | 1 | 2.92 | 2.03 |
| Smart Personality | 3 | 1.46 | 2.02 |
| Nursing Handjob Subject of (Sexual) | 1 | 2.89 | 2.01 |
| Younger Sister Role | 3 | 1.45 | 2.00 |
| Deepthroat Engages in (Sexual) | 2 | 1.80 | 1.98 |
| Cooking Engages in | 3 | 1.42 | 1.97 |
| Friendly Personality | 4 | 1.22 | 1.96 |
| Twin Boobjob Engages in (Sexual) | 2 | 1.77 | 1.94 |
| Braided Bun Hair | 1 | 2.80 | 1.94 |
| Rimming Handjob Engages in (Sexual) | 1 | 2.78 | 1.93 |
| Buttjob Subject of (Sexual) | 1 | 2.78 | 1.93 |
| Cunnilingus Subject of (Sexual) | 4 | 1.16 | 1.87 |
| Handjob Engages in (Sexual) | 4 | 1.16 | 1.86 |
| Twin Boobjob Subject of (Sexual) | 1 | 2.68 | 1.86 |
| Cowgirl Subject of (Sexual) | 6 | 0.95 | 1.86 |
| Intake Hair | 2 | 1.68 | 1.84 |
| Spoons Subject of (Sexual) | 2 | 1.67 | 1.83 |
| Wealthy Role | 2 | 1.66 | 1.82 |
| Big Breasts Body | 4 | 1.13 | 1.81 |
| Pessimist Personality | 1 | 2.60 | 1.80 |
| Pantyjob Engages in (Sexual) | 1 | 2.60 | 1.80 |
| Missionary Subject of (Sexual) | 4 | 1.12 | 1.80 |
| Multilingual Role | 1 | 2.59 | 1.80 |
| Reverse Cowgirl Subject of (Sexual) | 2 | 1.63 | 1.79 |
| Tutor Role | 1 | 2.55 | 1.77 |
| Sidehair Hair | 5 | 0.98 | 1.75 |
| Sixty-nine Engages in (Sexual) | 3 | 1.26 | 1.75 |
| Childhood Friend Role | 3 | 1.26 | 1.74 |
| Puffy Personality | 1 | 2.51 | 1.74 |
| Watashi Personality | 3 | 1.25 | 1.73 |
| Bad Student Role | 1 | 2.49 | 1.73 |
| Nursing Handjob Engages in (Sexual) | 1 | 2.49 | 1.72 |
| Boobjob Engages in (Sexual) | 4 | 1.07 | 1.72 |
| Full Sister Role | 2 | 1.56 | 1.72 |
| Baby-doll Clothes | 1 | 2.44 | 1.69 |
| Legwear Footjob Engages in (Sexual) | 1 | 2.44 | 1.69 |
| Half Updo Hair | 1 | 2.44 | 1.69 |
| Friend Role | 3 | 1.20 | 1.67 |
| Virgin Sex Engages in (Sexual) | 6 | 0.85 | 1.66 |
| Buttjob Engages in (Sexual) | 1 | 2.39 | 1.66 |
| Doggy Style Subject of (Sexual) | 5 | 0.92 | 1.66 |
| Ribbon Hair Tie Clothes | 3 | 1.19 | 1.65 |
| Piss Drinking Subject of (Sexual) | 1 | 2.36 | 1.64 |
| Butterfly Subject of (Sexual) | 3 | 1.17 | 1.63 |
| Facesitting Subject of (Sexual) | 1 | 2.35 | 1.63 |
| Deepthroat Subject of (Sexual) | 1 | 2.35 | 1.63 |
| Intercrural Sex Subject of (Sexual) | 1 | 2.28 | 1.58 |
| Pissing on Others Engages in (Sexual) | 1 | 2.27 | 1.57 |
| Tank Top Clothes | 2 | 1.41 | 1.55 |
| 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 |
| Straight Hair | 4 | 0.94 | 1.52 |
| Seventh Posture Engages in (Sexual) | 1 | 2.19 | 1.52 |
| Pissing Subject of (Sexual) | 1 | 2.18 | 1.51 |
| Footjob Subject of (Sexual) | 1 | 2.17 | 1.51 |
| Sexual Submissive Role | 1 | 2.17 | 1.51 |
| Closet Pervert Personality | 1 | 2.16 | 1.50 |
| Lazy Personality | 1 | 2.16 | 1.49 |
| Blowjob Engages in (Sexual) | 6 | 0.76 | 1.48 |
| Miniskirt Clothes | 3 | 1.06 | 1.47 |
| Flustered Personality | 1 | 2.12 | 1.47 |
| Tominagi Engages in (Sexual) | 1 | 2.11 | 1.46 |
| Pink Hair | 2 | 1.33 | 1.46 |
| Ahoge Hair | 2 | 1.32 | 1.45 |
| Sweets Lover Personality | 1 | 2.10 | 1.45 |
| Food Lover Personality | 1 | 2.09 | 1.45 |
| T-shirt Clothes | 2 | 1.31 | 1.44 |
| Tiny Braid Hair | 1 | 2.07 | 1.44 |
| Brother Complex Personality | 1 | 2.06 | 1.43 |
| Kind Personality | 3 | 1.03 | 1.42 |
| Hazel Eyes | 1 | 2.04 | 1.41 |
| Turtleneck Sweater Clothes | 1 | 2.04 | 1.41 |
| Butterfly Engages in (Sexual) | 1 | 2.02 | 1.40 |
| Sex in Public Places Engages in (Sexual) | 2 | 1.26 | 1.38 |
| Beret Clothes | 1 | 2.00 | 1.38 |
| Turtleneck Shirt Clothes | 1 | 1.98 | 1.38 |
| High School Student Role | 4 | 0.85 | 1.37 |
| Facesitting Engages in (Sexual) | 1 | 1.97 | 1.37 |
| Full Brother Role | 1 | 1.95 | 1.35 |
| Piledriver Subject of (Sexual) | 1 | 1.94 | 1.35 |
| Assertive Personality | 1 | 1.94 | 1.34 |
| Quickie Fix Engages in (Sexual) | 1 | 1.88 | 1.30 |
| Standing Sex Engages in (Sexual) | 1 | 1.87 | 1.29 |
| Standing Sex Subject of (Sexual) | 2 | 1.18 | 1.29 |
| Boobjob Subject of (Sexual) | 1 | 1.86 | 1.29 |
| Teen Body | 7 | 0.62 | 1.29 |
| Honest Personality | 1 | 1.84 | 1.27 |
| Sitting Sex Engages in (Sexual) | 1 | 1.82 | 1.26 |
| Son Role | 1 | 1.82 | 1.26 |
| Hidden Eyes | 1 | 1.80 | 1.25 |
| Anal Sex Engages in (Sexual) | 1 | 1.76 | 1.22 |
| Handjob Subject of (Sexual) | 1 | 1.75 | 1.22 |
| Short Shorts Clothes | 1 | 1.75 | 1.21 |
| Pajamas Clothes | 1 | 1.75 | 1.21 |
| Side Tail Hair | 1 | 1.75 | 1.21 |
| Missionary Engages in (Sexual) | 1 | 1.74 | 1.21 |
| Reverse Missionary Subject of (Sexual) | 1 | 1.74 | 1.20 |
| Cheerful Personality | 1 | 1.74 | 1.20 |
| Older Brother Role | 1 | 1.73 | 1.20 |
| Teal Eyes | 1 | 1.72 | 1.20 |
| Outgoing Personality | 1 | 1.72 | 1.19 |
| Footjob Engages in (Sexual) | 1 | 1.72 | 1.19 |
| Cowgirl Engages in (Sexual) | 1 | 1.71 | 1.19 |
| Loafers Clothes | 1 | 1.71 | 1.19 |
| Reserved Personality | 1 | 1.71 | 1.19 |
| Huge Breasts Body | 1 | 1.70 | 1.18 |
| Nipple Sucking Engages in (Sexual) | 1 | 1.70 | 1.18 |
| Doggy Style Engages in (Sexual) | 1 | 1.68 | 1.17 |
| Sitting Sex Subject of (Sexual) | 2 | 1.06 | 1.17 |
| Carefree Personality | 1 | 1.68 | 1.17 |
| Shorts Clothes | 1 | 1.68 | 1.16 |
| Parted to Side Hair | 2 | 1.05 | 1.15 |
| Garnet Eyes | 1 | 1.66 | 1.15 |
| Mini-dress Clothes | 1 | 1.64 | 1.13 |
| Waist Length+ Hair | 3 | 0.81 | 1.12 |
| Vaginal Fingering Engages in (Sexual) | 1 | 1.61 | 1.12 |
| Green Eyes | 2 | 1.02 | 1.12 |
| University Student Role | 1 | 1.59 | 1.10 |
| Ore Personality | 1 | 1.58 | 1.09 |
| Nipple Teasing Subject of (Sexual) | 1 | 1.57 | 1.09 |
| Older Sister Role | 1 | 1.56 | 1.08 |
| Jeans Clothes | 1 | 1.55 | 1.08 |
| Cunnilingus Engages in (Sexual) | 1 | 1.55 | 1.07 |
| Sex at School Engages in (Sexual) | 1 | 1.55 | 1.07 |
| Energetic Personality | 1 | 1.52 | 1.05 |
| Blowjob Subject of (Sexual) | 1 | 1.52 | 1.05 |
| Slim Body | 5 | 0.58 | 1.03 |
| Sailor School Uniform Clothes | 1 | 1.47 | 1.02 |
| Pissing Engages in (Sexual) | 1 | 1.47 | 1.02 |
| Daughter Role | 1 | 1.46 | 1.01 |
| Shoulder-length Hair | 2 | 0.92 | 1.01 |
| V Bangs Hair | 1 | 1.41 | 0.98 |
| Tsurime Eyes | 1 | 1.38 | 0.96 |
| Nipple Sucking Subject of (Sexual) | 1 | 1.38 | 0.96 |
| Wavy Hair | 1 | 1.36 | 0.94 |
| Skirt Clothes | 1 | 1.34 | 0.93 |
| Red Hair | 1 | 1.32 | 0.92 |
| Black Hair | 2 | 0.81 | 0.89 |
| Ribbon Tie Clothes | 1 | 1.25 | 0.87 |
| Blue Hair | 1 | 1.19 | 0.83 |
| Anal Sex Subject of (Sexual) | 1 | 1.19 | 0.82 |
| Twin Tails Hair | 1 | 1.13 | 0.78 |
| Necktie Clothes | 1 | 1.12 | 0.77 |
| Tareme Eyes | 1 | 1.11 | 0.77 |
| Pale Body | 7 | 0.37 | 0.76 |
| Quickie Fix Subject of (Sexual) | 1 | 1.08 | 0.75 |
| Vaginal Fingering Subject of (Sexual) | 1 | 1.08 | 0.75 |
| Thigh-high Stockings Clothes | 1 | 1.04 | 0.72 |
| Amber Eyes | 1 | 1.03 | 0.72 |
| Brown Eyes | 1 | 0.90 | 0.62 |
| Blond Hair | 1 | 0.89 | 0.62 |
| Young-adult Body | 1 | 0.76 | 0.53 |
| Long Hair | 1 | 0.75 | 0.52 |
| Short Hair | 1 | 0.61 | 0.42 |