It's okay, once you get around to playing V3 (the third main installment in the Danganronpa franchise), you might come across a bonus series of events known as the Love Hotels, which only occur at night after buying a special key in a casino. 

I know that might sound kinda confusing, but don't worry about it. You should definitely check these Love Hotel scenes out once you finish V3. Keep in mind, however, that there are some major spoilers in them, so I suggest that you don't look them up until after you complete all three main installments.