After divorcing her husband 10 years ago, Rina raised Taichi single-handedly, and when Taichi grew up, he found a job at a real estate company. However, Taichi didn't want to move from his home, which takes more than an hour to get to work. Rina was worried about Taichi, who didn't go on vacation or play, and didn't bring her friends or girlfriend. Rina invites Taichi to a hot spring trip, trying to take her outside once in a while.
