Synopsis:

Elder sister Honoka that loves younger brother Hirokazu. When Hirokazu buys a favorite magazine and the cake and returns, classmate Akasaki comes to play to Hirokazu's room. Honoka which falls silent in the state of happy two people. The emoticon mail of the crying face is instinctively sent to Hirokazu.
(...Hirokazu... it associates with that child a little while ago?)
Hirokazu denies it while becoming confused.
(When not having associated yet... continuation from ahead of that... i want you to do...)
It has embraced Honoka, the desire to Hirokazu is confessed. Knowing the wrong, Hirokazu who accepts it. Take off clothes when you love dearly the body of Honoka, the penis is inserted and it deprives of the virgin. Two people cum at the same time in the inside ejaculation.