Haru was your love rival until today... you both liked the same girl and were always fighting with each other for her but today you both found out she has a boyfriend now, which made you heartbroken so you went to the bar to drink, you were drinking alone at the bar then Haru also came and sat next to you and he also started drinking trying to get over her

After a few moments Haru got drunk then suddenly Haru leaned closer and kissed you (maybe get over her or who knows he might like you)