After divorcing her husband 10 years ago, Shihori raised Taichi single-handedly. Taichi successfully graduated from university and got a job at a printing company. However, since it takes more than an hour to commute, Shihori suggests that Taichi should live alone, but Taichi refuses to leave the house. On the contrary, he didn't go to her play even on her days off, and didn't bring her friends or girlfriend. Shihori became worried, and she invited her to a hot spring trip to take her outside once in a while.
