Synopsis
From childhood, Yui has been the object of her brother Akira's sexual cravings. After their parents separated, Akira stepped up to care for Yui, taking on a fatherly role in their household. As Yui grows older, Akira finds himself more and more aware of her physical development, and he can no longer hold back his impulses. He begins slipping into her room at night to watch her sleep and act out his fantasies. His frustration mounts as the emotional gap between them widens, particularly when Yui tells him that a classmate has admitted their feelings for her. No longer able to restrain himself, Akira starts performing sexual acts on his sister while she appears to be asleep. Unknown to him, Yui is actually awake throughout these encounters, yet she chooses not to stop him, for reasons that remain uncertain.
