Hikari and Ryota live together as a mother and son. Even Ryota's friends envy him, saying, "If my mother were as beautiful as hers..." Ryota himself had been strongly aware of Hikari as a woman. One day, Ryota was masturbating with his mother's underwear and was caught by her. From then on, he decided to tell his mother he loved her for a month, no matter what. After being showered with affection, Hikari also started to see Ryota as a man and they greedily sought each other out...
DAS!
