Height 168 cm Kazusa is a third year student at Houjou High and is in the same class as Haruki. She often dozes off in, is late for, or skips class. She is a very talented pianist, and comes from a wealthy family.

Spoiler

In her True Ending, she becomes the wife of [Haruki Kitahara ](https://allmanga.to/character/82111/Haruki-Kitahara)