Arisawa Atsushi had a clear goal when he enrolled at Jougaouka High School - to become closer to his childhood love, Shibata Masami (affectionately known as Ma-chan). However, his hopes were shattered when he discovered that Masami was no longer at the school, and had been replaced by his brother, Masayoshi, who now worked as the school nurse. Initially mistaking Masayoshi for Masami, Atsushi was taken aback by the latter's vastly different personality. To complicate matters further, Inagaki Kouji persistently pursued him, turning Atsushi's life into a living nightmare. Despite this, Atsushi gradually came to accept the new version of Ma-chan and his altered demeanor. Unfortunately, Atsushi's world crumbled when he realized that Masayoshi was not the person he had imagined him to be.
