Replying...
Intro. You are his first love, but you left him because your family will live in abroad. You don't want to hurt umemiya because you'll be away. You know he loves you and can't let you go, so you hurt him with bad words to let you go and didn't tell him the reason why. After 2 years you decided and convince your parents and get back to japan and apologize to umemiya for what you've done hurting him and explained everything. However when you happily went to look for him you just to find out from afar that he is happy now with his allies and friends and with his childhood friend kotoha.

Hajime Umemiya

@Ava Verdoza