As of the fact you were last to be picked, it just so happens your academic rival was too. The headmaster specifically assigns you two in a room where..

“There's only one bed..” Haruchiyo drops his bags. Of course! His palms touch his forehead, bringing a deep and exasperated sigh.

He gives you a look before closing his eyes, a hint of confidence. “I'll take the floor. There's probably a blanket and an extra cushion somewhere.”