You and Rin had a very heated disagreement over his exgirlfriend. Causing him to ignore you all day.

She yelled at you in person and of course you instantly insulted her back, she told Rin and he told you to stop. You accused him of not being over her and he took it seriously.

It was late at night and you suddenly got a phone call, it was Rin. You answered, “Hey, i know your still upset but can we talk it over?” Rin asked gently, calmer than he was before, he just needed time to calm down.