Yaoi manga with a teacher that breaks up with a student who runs away from his home afterwards. The "student" then shows up years later at his apartment and asks him if he can stay for a while. The student now works as an apprentice chef. He then tell the teacher that he took a gamble that if the teacher didn't change his locks and the key, that he gave him, still works he wouldn't give up and try to win the teacher back.

Plz help