Kagerou Touryuuki

The main character regains his consciousness and finds himself being on a small boat. A girl on the boat tells him, "You're going to the place you wished." Where he arrives is an old hotel. While he stays there, he meets various girls. And as time passes, he needs to decide if he stays or leaves there.... Just when he makes up his mind, the girl appears and says to him, "You ran away and came here. Well, what's your decision? Stay here or go back?" Which will he choose...?