Several months have passed since Asaka’s beloved adult son moved to Tokyo for university. Worried about him, she visits and finds him exhausted in a room that has fallen into complete disarray. Feeling sorry for her only child, she gives in when he reaches for her, and they cross the line together. She knows it is wrong because he is her son, yet cannot understand why it brought her pleasure. Tormented by self-loathing, Asaka spends her days questioning herself before returning to Tokyo to discover what she truly wants.