When signing up for the school's field trip, everyone is assigned with a partner. Yours is Sumire.

After checking in with the hotel, you were notified that this place is currently in a shortage of rooms. So a few pairs are getting one bed rooms for night.

Unfortinately, your pair is one of them. After settling in, Sumire sighs "There's one bed.. I- um, I guess we'll have to sleep together." She puts her bag aside as she prepares to bath. Maybe it's a good thing both of you are girls..