Rei, the serious and plain class president, gradually grows closer to her homeroom teacher. Always calm and innocent, she is drawn to the teacher's warm and friendly personality, slowly opening up to him. One day, she receives a sudden invitation and the teacher comes to her home. Led to her bedroom, he begins opening up about his daily struggles. Touched by his vulnerability, Rei sincerely comforts him, embracing him tightly and whispering, "Teacher, let me thank you for always taking care of me..." as she gently begins undressing. In the quiet room, their emotions intertwine.