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."
Let's have a signal 
to give each other privacy.
Klappt schon.
Bestimmen wir ein Signal.
Nos daremos privacidad con una señal.
Nos daremos privacidad con una señal.
On sort. Décidons d’un signal.
Studiamo un segnale
per darci la giusta privacy.
Não vou atrapalhar.
Vamos combinar um sinal.
Мешать не буду.
Давай определимся со знаком.
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