Tatsuya who holds secret Ren Kokoro in mother, Kyouka of Tomoaki who a thing does not have it and is beautiful, and is kind in comparison with one's mother. When I always came to the house of Tomoaki to play, looked at Kyouka with a look of the envy. On such one day, Tatsuya witnesses a figure of Kyouka performing onanism in a bathroom. Betrayed feelings went up, and Tatsuya who had watched an indecent figure of the Kyouka which I longed for has hit the feeling that I was not able to control on Kyouka.
