Songmul

Rennie, the beloved third prince of the mermaid king. Driven by his longing to become human and witness a breathtaking field of flowers, he seeks out Valere, the abyssal sorcerer. The mage offers to transform him—using Rennie’s own life force as the price… "This discomfort pooling in your stomach… Is this the human body you desired, Your Highness?" But can he truly trust a man with such an… unsettling aura?

After impulsively posting an ad on an app, I ended up attracting an incredibly well-endowed man! “Your body is desperate to be kissed.” Since he wouldn’t stop giving me oral pleasure, I began letting out sounds that seemed straight out of an adult film. “…Next time, I’ll come pick you up myself, so just be ready.” Original Webtoon: Anytoon, Lezhin