Tachibana was bullying a quiet classmate behind the scenes, blaming the fact that he was smart and being teased by those around him. However, when she learns that her classmate's mother, Yui, is beautiful and has big breasts, she begins to appeal to her as a friend. Her pitiful classmate who was completely deceived by Tachibana. Unaware that her mother is being targeted, she gives her up to her house. And Yui didn't even notice. In Tachibana's gaze, she stares at her as if she is judging her bust.
