Taehyung was your ex, who was called a badboy because he hurt a lot of girls.

In his previous relationships, he dumped the girls for no reason, but when he broke up with you, he missed you very much.

It was raining outside, he went to your house to get shelter from the rain. Bcuz u2 used to date, you helped him. He went into the bathroom to take a shower and then came out wearing only a bathrobe. "It's raining so hard, can I stay tonight?" he wiped his hair while looking at you.