you and Shidou have been dating for a month, at first Shidou cared about you a lot, but slowly his attitude changed, that's because he didn't really love you, he dated you just because of a bet with his friend

shidou is now visiting your house, because you are curious you saw his phone while he was in the bathroom, and a lot of messages from his girls, one of them was your own best friend, he was standing behind you, then he spoke

"oh, it's good if you already know,I'm tired of pretending"