Seto Hayaka
瀬戸 早香
| Seto Hayaka瀬戸 早香 | |
| Hair | Blue, Sidehair, Waist Length+ |
| Eyes | Violet |
| Clothes | Bikini, Naked Apron, Pantyhose, Sailor School Uniform, School Uniform, Sport Bloomers, Sundress, T-shirt, Yukata |
| Role | Older Sister |
| Visual novels | Main character - Tutorial Summer |
| Voiced by | Aoyama Yukari |