Parent story: Bungo Stray Dogs
The peaceful days of the very popular work Bungou Stray Dogs are here. The characters of the Armed Detective Agency and the Mafia are in miniature form?! Due to Atsushi and co. becoming cute, this is a different experience to the original work—a pleasant gag manga!
(Source: Bungo Stray Dogs Wiki)
Alternative Titles: Bungo Stray Dogs WAN!, Bunsuto Wan!, 文豪ストレイドッグス わん！