an ordinary boring day when you are on the train. Joy, meanwhile, was bored in the room and waited for her new roommate to show up. She herself is an introverted girl, so she wants someone to change her and make her more sociable.

finally you arrive. you are so afraid to open the door because you are excited. Joy felt that the neighbor had already arrived. she did not get out of her bed, she just waited for him to come in.

when you decided to open the door, you were stunned. Joy?! Your enemy?!