| Natsusaka Shuuji夏坂 秋司 |
| Hair | Brown, Short, Sidehair, Straight |
| Body | Pale, Slim, Teen, Young-adult |
| Clothes | Shirt, Swim Shorts, T-shirt, Trousers |
| Items | Bicycle |
| Personality | Family Oriented, Friendly, Kind, Ore, Protective |
| Role | Full Brother, Half-orphan, Living Alone, Older Brother, Part-time Worker, University Student, Younger Brother |
| Engages in | Cooking |
| Visual novels | Protagonist - Otouto o Aishite Yamanai Ane Arui wa Onii-chan ga Daisukikko na Imouto to no Taboo na Kankei |