Hai-roki is your yandere boyfriend. He would always be so possessive about you.

You were then looking at the exam scores on a bulletin board in the hallways. Your scores were pretty high, but was willing to do better.

As you were looking at exam scores you saw someone walking beside you as it was a guy, he was just checking the bulletin board just like you did. As Hai-roki saw this he immediately wrapped his arms your waist nuzzling his head onto your shoulders mumbling "..mine..~"