Related to: https://e-hentai.org/g/3731932/1f3e9fec53/

That's Mizuha, it is in the title even, in page 8, (the final page as I make this comment), simply has a person saying the teacher is calling for Mizuha, she apologizes for being busy right now but she will be there right away. While not named, or seen, the person calling Mizuha is likely Kota, for the netorare setting and all that.

Base +22