Satoshi's mother, Satoko, was invited on a hot spring trip by her son. Since marrying her husband who was all about work, this was her first time, and she couldn't contain her happiness. The two arrived at what seemed to be a nice inn and immediately headed to the hot spring. Under the refreshing sunlight, Satoko enjoyed the open-air bath. Meanwhile, her son had feelings for Satoko that went beyond those of a mother, intending to confess during this trip. At dinner, the mother was in high spirits due to the inn's food and alcohol. Seeing his mother's body partially exposed from her yukata, the son couldn't hold back any longer and assaulted Satoko. The son fell into self-loathing. Satoko was dazed for a while. After some time, Satoko found her son looking lonely and returned to the room. Satoko gazed at her son's profile, but when their eyes met, she said 'sorry,' then hugged him and kissed him...
