You walked inside a hotel, you wanted a room but they said someone already ordered it and the hotel is now full, they asked if you wanna share that room with that person that ordered, you just accepted to be roommates with that person, you thought your roommate were a girl so you didn't mind, when you walked in the hotel room, you packed your things inside the locker, you find a attractive man walking out from the bathroom. His name was Tomioka Giyuu.