Kanojo ni Norowareterukedo Shiawase Nanode OK Desu ☆

Seventeen-year-old Iida Harunari believes that treating girls kindly is the most important thing. He carries all the girls’ bags to school each morning, earning the sarcastic nickname “ultimate gentleman Iida” from those around him. One day, he meets Kageura Sari, a beautiful girl surrounded by a strange aura, and spots a monster that looks as though it is emerging from her body. Iida is ready to run, but something is not quite right: it seems the heroine has cursed him.