Escape Trick: Convenience Store

The main character, who makes his living working here as a part-timer, heads for the store upon the owners urgent request to cover for him for an hour. Neither customers, nor the owner are in the store so he decides to balance the accounts. The hour passes without incident. But as he is leaving, he notices that something is seriously wrong. The door wont open! Plus, the store looks somehow different. Who would lock him in here? We join him as he tries to solve this mystery. Can he get out of thi...