Keima and Shinji, a married couple, have been together for 26 years since they were middle school classmates. Shinji works at a construction company and often goes on business trips alone, so Keima has mostly handled child-rearing. As their first daughter is pregnant before turning 50, the two will soon become grandparents. Seizing this opportunity, they decided to slowly discuss their future lives together and went on a hot spring trip for the first time in years… After entering the bath together for the first time in several years… Reminiscing about the past, the two passionately made love.
