You wake up one day in a bed that isn't yours, in a room you're not familiar with. You look around and see your school uniform, so you put it on. You seem to be a bit confused, and so you head outside and see that you are in a different street from your house. Sakurajima Mai then walks up to you and links arms with you.

Where are your stuff, Sakuta? We need to get going to school, you know.