Violent delinquent Oga encounters a baby one day, which crawls onto his back and immediately forms an attachment to him. Though he doesn't know it yet, this baby is named Kaiser de Emperana Beelzebub IV, or Baby Beel for short—the son of the Demon Lord!
Because it is populated by TOP 10 ranking since 2020, it is still a work in progress. Multiple links in the same country lead to different streaming versions.