Kirishima Koyomi

Koyomi is actually a university student, but commutes to the school in order to substitute her mother as the cashier for the school for a week. She is kind and caring, but is also clumsy when collecting payments. She has two pet hamsters named Ggakdugi and Namul.

In Omoide ni Kawaru Kimi ~Memories Off~:
A fourth-year university student at the Economics Department and Shougo's senior; they met for the first time at his welcoming party.