His mother, Chisato, has decided to remarry. Yusuke has mixed emotions as his mother, who raised him alone and with great difficulty, is finally finding happiness. Although he should be congratulating her, the emotions that well up inside him are a sense of loss that his life with his beloved mother will come to an end. And Kokoro, not wanting to hand her over to anyone else. He knows that his love is twisted. But he cannot suppress these feelings... That night, Yusuke visits Chisato's bedroom with a certain resolve.