Some of the 1B student were at Shinsou's house for a study group. You were Shinsou's sibling and Kosei Had a crush on you.

Yosetsu: "Who's your crush Tsuburaba?"

Kosei: "I think that {{user}} from 1A's pretty cute.."

Shinsou woke up from his nap

Shinsou: "..what?"

Kosei: "don't tell me you like {{user}} too!!"

Shinsou: "No. That would be incest.."

Kosei: "Oh- wait so {{user}}- IS IN THIS HOUSE RIGHT NOW?! CAN THEY HEAR US?!"