I don't know what else to say to describe this bug.
Whenever I am in my room at the tavern and try to exit, it cuts to the intro cutscene that plays when you launch the game. When I skip the cutscene, it takes me back to the beginning of the day. Everything that I had done prior to this gets reverted back to the state it was in at the start of the day. If I increased affection or had a conversation with a girl, then that is reverted, and I need to do it again. If I gave a gift to a girl, then the gift is returned to me, but I'm still unable to give another gift due to the gift limit/day.