Kaho and Hiroshi, mother and child, have been close friends for a long time. It is customary to go on a hot spring trip with your family every year. This year, the father is busy and the mother and child are going on a hot spring trip together. The delicate relationship between mother and child is revealed in the absence of the father. Kaho is not close with her husband. Then Kaho and Hiroshi discover that they were aware of each other as the opposite sex. At first, Kaho refuses to be involved in public opinion, but in the end he accepts and greedily seeks out the relationship between mother and child...
