Hajime cheated on Tooru once and it took a long time to forgive him.
It was a boy from Shiratorizawa; Ushijima send him on this 'mission' to destroy their relationship. (As I said in another chapter, Ushijima has a huge crush on Tooru)
Oikawa's world was shattered but after a month he couldn't stand living without his love.
School starts tomorrow and I'm not ready for this, send help.
