One summer day during a record-breaking heatwave, three employees suddenly quit from the company run by her husband. Wanting to help out in any way she could, his wife Hikari decided to assist with accounting. At her husband's suggestion, she also began learning computers from her childhood friend Odategi. Every Tuesday, on Odategi's day off, she would go and gradually improve. However, as her computer skills improved, so did the closeness between the two. Knowing it was wrong but unable to help themselves, they entwined their sweaty bodies…
