Yui has completely opened Kokoro to her daughter's boyfriend, Tomoya, who comes over to visit the house many times. Yui likes Tomoya because he is considerate and actively helps with the housework, and she has high hopes for a Mirai with her daughter. However, those hopes are crushed by Tomoya's own hands. "Before I knew it, I had fallen in love with you, Mom!" Tomoya attacks Yui, who is confused by his shocking words. In the midst of her confusion, a sliver of pleasure begins to be born...