Ero Mabeopsaui Yeonguilji

Deacon is a former warrior who once enjoyed a life of fame and honor, that is to say, before he went completely bankrupt. While Deacon rummages around to look for work, he runs into Lagabi: his long-time wizard friend and his secret crush. Knowing Deacon's situation, Lagabi decides to hire Deacon to assist him in his research projects that involve "special" experiments. Deacon enthusiastically accepts the offer, but the next thing he knows, he's being toyed by some slimy demonic tentacles! Turns out that this research assistant job wasn't exactly what Deacon had expected it to be. Now Deacon finds himself trapped in a cycle of pleasure, and he's willing to let his secret desires loose...
(Source: POCKET COMICS)