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 | 2.03 | 3.63 |
| Sex in Front of an Audience Engages in (Sexual) | 7 | 1.51 | 3.14 |
| Imouto Act Role | 2 | 2.60 | 2.86 |
| Nipple Teasing Engages in (Sexual) | 3 | 2.04 | 2.83 |
| Face-farting Subject of (Sexual) | 1 | 4.00 | 2.77 |
| Seventh Posture Subject of (Sexual) | 5 | 1.45 | 2.60 |
| Intercrural Sex Engages in (Sexual) | 3 | 1.85 | 2.57 |
| Group Sex of One Male and Several Females Engages in (Sexual) | 7 | 1.19 | 2.48 |
| French Kiss Engages in (Sexual) | 4 | 1.52 | 2.45 |
| Milking (Sexual) Subject of (Sexual) | 2 | 2.21 | 2.43 |
| Deredere Personality | 3 | 1.75 | 2.43 |
| Bukkake Subject of (Sexual) | 5 | 1.34 | 2.41 |
| Ahegao Engages in (Sexual) | 5 | 1.33 | 2.38 |
| Incest Engages in (Sexual) | 4 | 1.47 | 2.37 |
| Henpecked Personality | 1 | 3.39 | 2.35 |
| Female Ejaculation Engages in (Sexual) | 4 | 1.38 | 2.22 |
| Tominagi Subject of (Sexual) | 4 | 1.36 | 2.19 |
| Sex in Water Engages in (Sexual) | 3 | 1.56 | 2.16 |
| Pantyjob Subject of (Sexual) | 1 | 3.06 | 2.12 |
| Nursing Handjob Subject of (Sexual) | 1 | 3.03 | 2.10 |
| Cousin Role | 2 | 1.88 | 2.06 |
| Blouse Clothes | 3 | 1.48 | 2.05 |
| Smart Personality | 3 | 1.47 | 2.03 |
| Romantically Indecisive Personality | 1 | 2.93 | 2.03 |
| Younger Sister Role | 3 | 1.44 | 2.00 |
| Deepthroat Engages in (Sexual) | 2 | 1.81 | 1.99 |
| Friendly Personality | 4 | 1.23 | 1.98 |
| Rimming Handjob Engages in (Sexual) | 1 | 2.86 | 1.98 |
| Cooking Engages in | 3 | 1.41 | 1.96 |
| Buttjob Subject of (Sexual) | 1 | 2.81 | 1.95 |
| Braided Bun Hair | 1 | 2.80 | 1.94 |
| Twin Boobjob Engages in (Sexual) | 2 | 1.76 | 1.94 |
| Big Breasts Body | 4 | 1.19 | 1.91 |
| Cunnilingus Subject of (Sexual) | 4 | 1.17 | 1.88 |
| Handjob Engages in (Sexual) | 4 | 1.16 | 1.87 |
| Cowgirl Subject of (Sexual) | 6 | 0.95 | 1.85 |
| Twin Boobjob Subject of (Sexual) | 1 | 2.67 | 1.85 |
| Spoons Subject of (Sexual) | 2 | 1.67 | 1.83 |
| Intake Hair | 2 | 1.66 | 1.83 |
| Wealthy Role | 2 | 1.66 | 1.82 |
| Multilingual Role | 1 | 2.62 | 1.81 |
| Pessimist Personality | 1 | 2.60 | 1.80 |
| Reverse Cowgirl Subject of (Sexual) | 2 | 1.64 | 1.80 |
| Pantyjob Engages in (Sexual) | 1 | 2.59 | 1.80 |
| Missionary Subject of (Sexual) | 4 | 1.11 | 1.79 |
| Nursing Handjob Engages in (Sexual) | 1 | 2.57 | 1.78 |
| Tutor Role | 1 | 2.55 | 1.77 |
| Watashi Personality | 3 | 1.26 | 1.75 |
| Sidehair Hair | 5 | 0.98 | 1.75 |
| Half Updo Hair | 1 | 2.52 | 1.74 |
| Puffy Personality | 1 | 2.51 | 1.74 |
| Sixty-nine Engages in (Sexual) | 3 | 1.25 | 1.74 |
| Childhood Friend Role | 3 | 1.25 | 1.73 |
| Full Sister Role | 2 | 1.57 | 1.73 |
| Bad Student Role | 1 | 2.48 | 1.72 |
| Legwear Footjob Engages in (Sexual) | 1 | 2.48 | 1.72 |
| Boobjob Engages in (Sexual) | 4 | 1.06 | 1.71 |
| Baby-doll Clothes | 1 | 2.43 | 1.68 |
| Friend Role | 3 | 1.21 | 1.68 |
| Buttjob Engages in (Sexual) | 1 | 2.41 | 1.67 |
| Doggy Style Subject of (Sexual) | 5 | 0.92 | 1.65 |
| Facesitting Subject of (Sexual) | 1 | 2.37 | 1.64 |
| Virgin Sex Engages in (Sexual) | 6 | 0.84 | 1.64 |
| Ribbon Hair Tie Clothes | 3 | 1.18 | 1.64 |
| Deepthroat Subject of (Sexual) | 1 | 2.36 | 1.64 |
| Piss Drinking Subject of (Sexual) | 1 | 2.36 | 1.64 |
| Butterfly Subject of (Sexual) | 3 | 1.17 | 1.63 |
| Intercrural Sex Subject of (Sexual) | 1 | 2.29 | 1.59 |
| Tank Top Clothes | 2 | 1.43 | 1.57 |
| Pissing on Others Engages in (Sexual) | 1 | 2.26 | 1.57 |
| Reverse Cowgirl Engages in (Sexual) | 1 | 2.24 | 1.56 |
| Spoons Engages in (Sexual) | 1 | 2.23 | 1.55 |
| Straight Hair | 4 | 0.96 | 1.54 |
| Bathroom Sex Engages in (Sexual) | 2 | 1.39 | 1.53 |
| Closet Pervert Personality | 1 | 2.21 | 1.53 |
| Seventh Posture Engages in (Sexual) | 1 | 2.20 | 1.52 |
| Sexual Submissive Role | 1 | 2.19 | 1.52 |
| Pissing Subject of (Sexual) | 1 | 2.18 | 1.51 |
| Footjob Subject of (Sexual) | 1 | 2.18 | 1.51 |
| Lazy Personality | 1 | 2.15 | 1.49 |
| Flustered Personality | 1 | 2.14 | 1.49 |
| Tominagi Engages in (Sexual) | 1 | 2.14 | 1.48 |
| Blowjob Engages in (Sexual) | 6 | 0.76 | 1.48 |
| Miniskirt Clothes | 3 | 1.07 | 1.48 |
| Pink Hair | 2 | 1.32 | 1.45 |
| Sweets Lover Personality | 1 | 2.09 | 1.45 |
| Food Lover Personality | 1 | 2.09 | 1.45 |
| T-shirt Clothes | 2 | 1.32 | 1.45 |
| Ahoge Hair | 2 | 1.31 | 1.44 |
| Kind Personality | 3 | 1.04 | 1.44 |
| Tiny Braid Hair | 1 | 2.07 | 1.43 |
| Brother Complex Personality | 1 | 2.06 | 1.43 |
| Turtleneck Sweater Clothes | 1 | 2.05 | 1.42 |
| Butterfly Engages in (Sexual) | 1 | 2.04 | 1.41 |
| Hazel Eyes | 1 | 2.04 | 1.41 |
| Sex in Public Places Engages in (Sexual) | 2 | 1.26 | 1.39 |
| Facesitting Engages in (Sexual) | 1 | 2.00 | 1.38 |
| Turtleneck Shirt Clothes | 1 | 1.99 | 1.38 |
| Beret Clothes | 1 | 1.98 | 1.37 |
| Assertive Personality | 1 | 1.96 | 1.36 |
| Full Brother Role | 1 | 1.95 | 1.35 |
| Piledriver Subject of (Sexual) | 1 | 1.95 | 1.35 |
| High School Student Role | 4 | 0.84 | 1.35 |
| Quickie Fix Engages in (Sexual) | 1 | 1.89 | 1.31 |
| Standing Sex Engages in (Sexual) | 1 | 1.88 | 1.31 |
| Boobjob Subject of (Sexual) | 1 | 1.87 | 1.30 |
| Standing Sex Subject of (Sexual) | 2 | 1.18 | 1.29 |
| Honest Personality | 1 | 1.84 | 1.28 |
| Teen Body | 7 | 0.61 | 1.28 |
| Sitting Sex Engages in (Sexual) | 1 | 1.83 | 1.27 |
| Son Role | 1 | 1.83 | 1.27 |
| Hidden Eyes | 1 | 1.81 | 1.25 |
| Short Shorts Clothes | 1 | 1.79 | 1.24 |
| Huge Breasts Body | 1 | 1.78 | 1.23 |
| Cheerful Personality | 1 | 1.78 | 1.23 |
| Anal Sex Engages in (Sexual) | 1 | 1.77 | 1.23 |
| Outgoing Personality | 1 | 1.76 | 1.22 |
| Handjob Subject of (Sexual) | 1 | 1.76 | 1.22 |
| Missionary Engages in (Sexual) | 1 | 1.75 | 1.21 |
| Pajamas Clothes | 1 | 1.75 | 1.21 |
| Side Tail Hair | 1 | 1.74 | 1.21 |
| Reverse Missionary Subject of (Sexual) | 1 | 1.73 | 1.20 |
| Reserved Personality | 1 | 1.73 | 1.20 |
| Older Brother Role | 1 | 1.72 | 1.20 |
| Teal Eyes | 1 | 1.72 | 1.19 |
| Cowgirl Engages in (Sexual) | 1 | 1.72 | 1.19 |
| Loafers Clothes | 1 | 1.72 | 1.19 |
| Nipple Sucking Engages in (Sexual) | 1 | 1.71 | 1.19 |
| Footjob Engages in (Sexual) | 1 | 1.71 | 1.19 |
| Doggy Style Engages in (Sexual) | 1 | 1.70 | 1.18 |
| Parted to Side Hair | 2 | 1.07 | 1.17 |
| Shorts Clothes | 1 | 1.67 | 1.16 |
| Carefree Personality | 1 | 1.67 | 1.16 |
| Sitting Sex Subject of (Sexual) | 2 | 1.05 | 1.16 |
| Garnet Eyes | 1 | 1.65 | 1.14 |
| Mini-dress Clothes | 1 | 1.63 | 1.13 |
| Vaginal Fingering Engages in (Sexual) | 1 | 1.62 | 1.13 |
| University Student Role | 1 | 1.62 | 1.12 |
| Sex in Classroom Engages in (Sexual) | 1 | 1.61 | 1.12 |
| Green Eyes | 2 | 1.01 | 1.11 |
| Waist Length+ Hair | 3 | 0.80 | 1.11 |
| Nipple Teasing Subject of (Sexual) | 1 | 1.59 | 1.10 |
| Ore Personality | 1 | 1.59 | 1.10 |
| Jeans Clothes | 1 | 1.58 | 1.09 |
| Cunnilingus Engages in (Sexual) | 1 | 1.56 | 1.08 |
| Older Sister Role | 1 | 1.55 | 1.08 |
| Blowjob Subject of (Sexual) | 1 | 1.53 | 1.06 |
| Energetic Personality | 1 | 1.53 | 1.06 |
| Sailor School Uniform Clothes | 1 | 1.48 | 1.03 |
| Slim Body | 5 | 0.57 | 1.02 |
| Daughter Role | 1 | 1.47 | 1.02 |
| Pissing Engages in (Sexual) | 1 | 1.46 | 1.01 |
| Shoulder-length Hair | 2 | 0.91 | 1.00 |
| V Bangs Hair | 1 | 1.42 | 0.98 |
| Nipple Sucking Subject of (Sexual) | 1 | 1.39 | 0.96 |
| Tsurime Eyes | 1 | 1.38 | 0.95 |
| Wavy Hair | 1 | 1.36 | 0.94 |
| Skirt Clothes | 1 | 1.33 | 0.92 |
| Red Hair | 1 | 1.32 | 0.92 |
| Black Hair | 2 | 0.81 | 0.89 |
| Ribbon Tie Clothes | 1 | 1.24 | 0.86 |
| Anal Sex Subject of (Sexual) | 1 | 1.19 | 0.82 |
| Blue Hair | 1 | 1.19 | 0.82 |
| Twin Tails Hair | 1 | 1.12 | 0.78 |
| Pale Body | 7 | 0.37 | 0.77 |
| Necktie Clothes | 1 | 1.11 | 0.77 |
| Tareme Eyes | 1 | 1.09 | 0.76 |
| Vaginal Fingering Subject of (Sexual) | 1 | 1.08 | 0.75 |
| Quickie Fix Subject of (Sexual) | 1 | 1.08 | 0.75 |
| Thigh-high Stockings Clothes | 1 | 1.03 | 0.72 |
| Amber Eyes | 1 | 1.02 | 0.71 |
| Brown Eyes | 1 | 0.90 | 0.62 |
| Blond Hair | 1 | 0.88 | 0.61 |
| Young-adult Body | 1 | 0.77 | 0.53 |
| Long Hair | 1 | 0.75 | 0.52 |
| Short Hair | 1 | 0.61 | 0.42 |