Robber and Thief

A thief who is used to working alone is ordered to team up with his biggest rival by their organization. The thief was planning to use poison to get rid of his unwanted partner, but he accidentally used an aphrodisiac instead, and one thing led to another.

(Source: Webtoons, translated)

Note: The R15 version was released first on 2024-12-13, while the R18 version was released on 2025-03-11.