The owner of a convenience store has a hobby of collecting keys left behind by customers - fragments of promises, and the female lead leaves her key there as well. Later, after both of them get into separate fights and end up with nosebleeds, she storms back into the store, only to find that only cakes are left. She starts drinking and eats the cakes one by one, until she passes out drunk in the store. Then he kissed the cake off the corner of her mouth. and she opens her eyes slightly to take a glance. From then on, for many nights, she keeps coming back - sometimes truly drunk, sometimes pret...