Kono Koi wa Fukami-kun no Plan ni wa Nai.

A boy who is intelligent and well-liked by girls ends up rejected despite receiving confessions, due to his inflexible nature. One day, while searching for her cat on school grounds, a girl named Higurashi Akio accidentally kisses him. She appears completely unfazed by the incident, which initially annoys the boy. Over time, however, he becomes intrigued by her unpredictable behavior. The story explores the evolving relationship between the rigid boy and the carefree girl. Three additional chapters are included.