Tsumi to Batsu no Spica

At an ordinary high school, Hatori is an ordinary teacher living an ordinary life. He discovers one day that Spica Tsumugi, one of his students, is being harassed. He finds himself in the rain alone himself with Tsumugi on his way home from school. "Sensei will assist you," Hatori yells at her. However, Tsumugi smiles and holds his hand gently before stating, "Hatori-sensei is such a liar." Instructor and pupil... Two individuals who ought to avoid becoming too close. The alluring female who will completely upend Hatori's routine life