Minase ── an isolated island due to its poor accessibility. However, the protagonist used to go there a lot in his childhood. After entering medical school, his parents were worried about him losing his edge due to the daily study schedule. They wanted to refresh him. The protagonist comes to the island again after being advised to visit his cousins during his summer vacation. He remembers his childhood with them, and being treated like a real family member. Suiren was beautiful when she was a child, and she was very kind and was like a real sister to him. Shion was like a tomboy little sister and used to follow him around. The protagonist wonders how the two of them have grown up. He can hear their voices afar from their house. Upon his arrival, he reunited with the two grown-up sisters. Suiren has become a gorgeous woman with a beautiful feminine body overflowing with tolerance and kindness. Shion, who has grown into a pretty girl, has a somewhat disgruntled look and only talks to the bare minimum necessary. An older sister who never changes and a younger sister who has changed. Feeling puzzled, as recommended by Suiren, who seems to have been waiting for the main character, the protagonist stay at their house for a while. How will he spend his time with them on the island under the summer sun? [From Getchu]
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| Name | Score | Importance | Weight |
|---|---|---|---|
| Protagonist with Voiced Changeable Names | 3.00 | 3.07 | 9.21 |
| Cousin Romance | 2.80 | 2.37 | 6.64 |
| Island | 3.00 | 1.94 | 5.82 |
| Non-twin Heroine Sisters | 2.75 | 2.05 | 5.65 |
| Cousin Incest | 2.67 | 2.00 | 5.33 |
| Threesome Ending | 3.00 | 1.72 | 5.17 |
| Summer | 3.00 | 1.66 | 4.97 |
| Protagonist's Cousin as a Heroine | 2.60 | 1.88 | 4.88 |
| Oneesan-type Heroine | 2.67 | 1.81 | 4.83 |
| Track Display | 2.00 | 2.41 | 4.81 |
| Armpit Sex | 2.00 | 1.98 | 3.96 |
| Read Text Marking | 2.00 | 1.84 | 3.68 |
| Sex with Protagonist Only | 3.00 | 1.12 | 3.36 |
| Threesome | 2.00 | 1.60 | 3.20 |
| High Sexual Content | 3.00 | 1.03 | 3.10 |
| Early Sexual Content | 2.50 | 1.22 | 3.04 |
| Heroine with Huge Breasts | 2.00 | 1.45 | 2.90 |
| Background Moans | 2.00 | 1.42 | 2.85 |
| Sounds of Copulation | 2.00 | 1.27 | 2.55 |
| Adult Heroine | 2.00 | 1.13 | 2.27 |
| Only Virgin Heroines | 2.00 | 1.07 | 2.14 |
| Nukige | 3.00 | 0.64 | 1.93 |
| Heroine with Big Breasts | 2.00 | 0.88 | 1.77 |
| High School Student Heroine | 2.00 | 0.84 | 1.69 |
| Defloration | 2.00 | 0.75 | 1.49 |
| Nameable Protagonist | 1.50 | 0.91 | 1.37 |
| ADV | 2.00 | 0.14 | 0.29 |
| 2.00 | 0.00 | 0.00 |
| Name | Characters | Importance | Weight |
|---|---|---|---|
| Cousin Role | 2 | 1.88 | 2.06 |
| Mobile Phone Items | 2 | 1.78 | 1.96 |
| Pajamas Clothes | 2 | 1.75 | 1.92 |
| Reverse Missionary Subject of (Sexual) | 2 | 1.73 | 1.91 |
| Geta Clothes | 1 | 2.69 | 1.86 |
| Camera Items | 1 | 2.54 | 1.76 |
| Sleeveless Sweater Clothes | 1 | 2.54 | 1.76 |
| Naked Shirt Clothes | 1 | 2.49 | 1.73 |
| Full Sister Role | 2 | 1.57 | 1.73 |
| Armpit Sex Engages in (Sexual) | 1 | 2.48 | 1.72 |
| Clothing with Ribbons Clothes | 2 | 1.56 | 1.72 |
| Sex in Water Engages in (Sexual) | 2 | 1.56 | 1.71 |
| Incest Engages in (Sexual) | 2 | 1.47 | 1.62 |
| Bikini Clothes | 2 | 1.46 | 1.61 |
| Seventh Posture Subject of (Sexual) | 2 | 1.45 | 1.60 |
| Bathroom Sex Engages in (Sexual) | 2 | 1.39 | 1.53 |
| Sex on Beach Engages in (Sexual) | 1 | 2.19 | 1.52 |
| Off-The-Shoulder Shirt Clothes | 1 | 2.16 | 1.49 |
| Bukkake Subject of (Sexual) | 2 | 1.34 | 1.48 |
| Consensual Porn Acting Engages in (Sexual) | 1 | 2.09 | 1.45 |
| Sex in a Vehicle Engages in (Sexual) | 1 | 2.05 | 1.42 |
| Belt Clothes | 2 | 1.28 | 1.41 |
| Mutual Masturbation Engages in (Sexual) | 1 | 1.93 | 1.34 |
| Group Sex of One Male and Several Females Engages in (Sexual) | 2 | 1.19 | 1.31 |
| Blue Hair | 2 | 1.19 | 1.30 |
| Butterfly Subject of (Sexual) | 2 | 1.17 | 1.29 |
| Yukata Clothes | 1 | 1.85 | 1.28 |
| Handjob Engages in (Sexual) | 2 | 1.16 | 1.27 |
| Outdoor Sex Engages in (Sexual) | 2 | 1.16 | 1.27 |
| Shirt Clothes | 2 | 1.15 | 1.27 |
| Vaginal Masturbation Engages in (Sexual) | 1 | 1.77 | 1.23 |
| Hair Flower Clothes | 1 | 1.76 | 1.22 |
| Sport Bloomers Clothes | 1 | 1.71 | 1.18 |
| Quickie Fix Subject of (Sexual) | 2 | 1.08 | 1.18 |
| Boobjob Engages in (Sexual) | 2 | 1.06 | 1.17 |
| Reverse Cowgirl Subject of (Sexual) | 1 | 1.64 | 1.14 |
| Older Sister Role | 1 | 1.55 | 1.08 |
| Kimono Clothes | 1 | 1.55 | 1.08 |
| Sidehair Hair | 2 | 0.98 | 1.07 |
| Straight Hair | 2 | 0.96 | 1.05 |
| Cowgirl Subject of (Sexual) | 2 | 0.95 | 1.05 |
| Sailor School Uniform Clothes | 1 | 1.48 | 1.03 |
| Younger Sister Role | 1 | 1.44 | 1.00 |
| Tank Top Clothes | 1 | 1.43 | 0.99 |
| Pleated Skirt Clothes | 1 | 1.41 | 0.98 |
| Hair Tie Clothes | 1 | 1.41 | 0.98 |
| Blunt Bangs Hair | 1 | 1.40 | 0.97 |
| Hairpin Clothes | 1 | 1.39 | 0.97 |
| Nipple Sucking Subject of (Sexual) | 1 | 1.39 | 0.96 |
| Female Ejaculation Engages in (Sexual) | 1 | 1.38 | 0.96 |
| Tsurime Eyes | 1 | 1.38 | 0.95 |
| Virgin Sex Engages in (Sexual) | 2 | 0.84 | 0.93 |
| Skirt Clothes | 1 | 1.33 | 0.92 |
| T-shirt Clothes | 1 | 1.32 | 0.91 |
| Blue Eyes | 2 | 0.80 | 0.88 |
| Sex in Public Places Engages in (Sexual) | 1 | 1.26 | 0.87 |
| Sixty-nine Engages in (Sexual) | 1 | 1.25 | 0.87 |
| Blowjob Engages in (Sexual) | 2 | 0.76 | 0.84 |
| Long Hair | 2 | 0.75 | 0.83 |
| Standing Sex Subject of (Sexual) | 1 | 1.18 | 0.82 |
| Cunnilingus Subject of (Sexual) | 1 | 1.17 | 0.81 |
| Twin Tails Hair | 1 | 1.12 | 0.78 |
| Missionary Subject of (Sexual) | 1 | 1.11 | 0.77 |
| Ponytail Hair | 1 | 1.10 | 0.76 |
| Vaginal Fingering Subject of (Sexual) | 1 | 1.08 | 0.75 |
| Miniskirt Clothes | 1 | 1.07 | 0.74 |
| Sitting Sex Subject of (Sexual) | 1 | 1.05 | 0.73 |
| Doggy Style Subject of (Sexual) | 1 | 0.92 | 0.64 |
| Slim Body | 2 | 0.57 | 0.63 |
| High School Student Role | 1 | 0.84 | 0.58 |
| Young-adult Body | 1 | 0.77 | 0.54 |
| Teen Body | 1 | 0.61 | 0.43 |
| Pale Body | 2 | 0.37 | 0.41 |