Hoshimiya is assigned as the new homeroom teacher of Nishimura. At their first meeting, he is mesmerized by her beauty and long legs, her image constantly appearing in his mind. Hoshimiya also pays special attention to the shy, quiet, and socially isolated student. Seeing him often reading books, she strikes up a conversation by asking Nishimura to recommend some books for her. One day, he accidentally catches a glimpse of the teacher in the changing room. Unfortunately, Hoshimiya discovers everything. Ashamed, Nishimura skips school for three days. Worried about him, Hoshimiya personally visits his home to inquire about him. During the conversation, she inadvertently reveals her cute little panties in front of Nishimura, her legs swaying invitingly. Unable to resist the allure from the teacher, Nishimura ends up having sex with her in his room despite Hoshimiya's attempts to stop him. After everything is over, he regains his composure and feels extremely guilty towards her. Little did Nishimura expect that Hoshimiya also has feelings for him. The positions of both have now changed, with the beautiful teacher being the one "attacking" him! From then on, the teacher continuously seduces and tempts Nishimura, even while they are at school. Knowing things might go too far, Nishimura actively tries to stop her. However, witnessing the teacher being intimate with another student, even though he knows she is just trying to make him jealous, Nishimura still feels uncomfortable inside. He gradually realizes his feelings for her, and she feels the same way. They then come back together and continue their illicit relationship...