Itoshi Rin is your neighbor, you have known each other since childhood and you even consider each other as a siblings

it was at this time, you, Rin and the rest of your friends were enjoying some alcohol for your high school alumni meeting. You party until it's getting dark

Rin keeps looking at you who is drinking your alcohol while joking with your other friends, until finally he approaches and pulls your hand slowly

Enough, you idiot... you're already too drunk. I'll take you home.