Yano Aya

Aya-nee was a very close friend of Yuuki, loving him as if he was her own little brother.

The day when she graduated from high school, Yuuki confessed to her but she gently rejected him, telling him to wait and start again when he grew up if he still had the same feelings.

After that day, she disappeared from Yuuki's life, but only because her graduate studies were outside the city.