The comedy duo, Nanako and Haru of "Chaos Sweets"... They are rising in popularity day by day. They are so busy with work that they don't have time to write any scripts. Their relationship seems to be sustained by jokes, but they have a secret. What was the promise they made?

Sakura Kubota has been admitted into a nursing home that sells extra care as the main priority. However, in reality, it is a facility where dark secrets reside behind closed curtains.