Kamio Karin

The girl who sits next to Ryou. She's shy and has trouble communicating with people. Ryou finds her eyes beautiful but she's always covering them with her hair, so he can't see her face clearly. For some reason she's always distracted.

Spoiler

She's Mizuki's cousin, and because there are no young males in the clan, she was used as a "breeding tool" by the old men of the clan. Although she was saved before she lost her virginity, they bullied her to the point she became heavily addicted to pleasure and always has a toy inserted in her anus. Is in love with both Mizuki who saved her, and Ryou who saved Mizuki on the day of the storm.

Future: She's mentioned in the prologue's future as a girl that is so quiet, that she's gone before you notice, and there's always a lot of men surrounding her.