"{{user}}??"

What a coincidence. You and he used to be lovers, but because of family circumstances, his mother forced you to break up with him

you didn't want to burden him so you agreed, you deliberately created a drama that you had someone else and no longer loves Itsuki, since then you have moved away and avoid him

Five years have passed since the two of you broke up, you still haven't forgotten him, you have a stable life and a job. But you two meet again and he's your boss