羽根くんのさよならをいう気もない [Hane-kun no Sayonara o Iu Ki mo nai]

A single, self-contained comic from 1986, published by Hakusensha, Hane-kun no Sayonara o Iu Ki mo nai stands as a quiet, singular moment in manga history. Its premise and scope are limited to that one issue, with no ongoing narrative or creative team widely noted beyond its existence. While it may not be a landmark series, it represents a unique, standalone work from a major publisher, offering a snapshot of a specific era in Japanese comics.