Yatsuzuka Machi

Machi is a female teacher who teaches Japanese at Yuihime Girls' Academy. She is the homeroom teacher of Shingo's class, 2-T; Airi, Angelina, Sana and Hayata are also in the same class. She is shy and is not good at talking with young men, but she actually likes boys' love. She is a 29-year-old single woman and wants to get married as soon as possible. In Miu's route, she becomes the adviser for the Nuko-bu.

From Wikipedia