Hana, a married woman, recently started working part-time at a family restaurant. Despite her beautiful and intelligent appearance, she is clumsy and makes a lot of mistakes. Maeda, a senior part-time worker, is attracted to Hana's cuteness, which is hard to believe for a married woman, and volunteers to be her trainer. After closing time, the two of them repeatedly train together in the restaurant... Hana grows day by day, and the distance between Hana and Maeda is rapidly closing! She has even started to do naughty things in the restaurant while it is open...