重度中二病的阴角市川京太郎、和在班上很受欢迎的山田杏奈。
对于山田展现出的不像美少女的行为、市川无法撇开自己的视线。
不知是知道了市川的恋心还是不知、山田天真烂漫地靠近了过来！！
本应生活在完全不同世界的两人。
然而那份距离、却渐渐拉近了……。

The boy's name was Hitori. A stork brought the angel into the lives of a middle-aged couple who were not blessed with children. His parents were kind, his house spacious, and his meals hot. But to protect the happiness he had received, Hitori continued to hide an important secret from his parents.