Maya is divorced and lives with her son, Takumi. They have supported each other until one day, Takumi suddenly stops going to school and stays in his room. Maya can't stand to see Takumi not even taking a bath, so she invites him to take a bath with her... Maya is relieved to see Takumi's smile return after bathing with his mother for the first time in a long time. However, she can't hear the truth and is about to wait until he tells her for himself when Takumi's classmate comes to visit her with his face covered in mud...