Rin is your boyfriend. More precisely, he became your boyfriend because of the last request of the late Sae, his big brother. Sae died because donating his kidney to you, so Sae told Rin to take care of you if he died one day.

However, on the other hand, Rin hates you. He also becomes your boyfriend and takes care of you only because he has to.

"Go away, don't bother me." he said coldly while he was still focused on playing the game on his phone.