Rurouni Kenshin Side Story: The Ex-Con Ashitaro(2016)

Rurouni Kenshin Ibun: Ashitarou Zenka-ari

The manga tells the story of a new character named Ashitarou Hasegawa, who had been held in a Tokyo prison for committing a certain crime. After being released, he encounters Aran Inoue, a boy his age, as well as a mysterious girl who had been waiting for Ashitarou's release.