In the dormitory of an all-boys school, Mao ends up sharing a room with Hisashi. They make three promises to each other: "Mao won't disclose that Hisashi is gay and has a boyfriend," "Kotobuki won't see Mao as a romantic interest and won't make a move on him," and "they won't interfere with each other's private activities."
But it really is unusual 
that he agreed to it.
Jetzt, wo er es sagt …
Es bastante inusual que acepte.
Es bastante inusual que acepte.
C’est vrai, ça.
Però è davvero strano che abbia accettato.
Por falar nisso...
Если так подумать…
удивительно, что Хисаси согласился.