A Love That's Not Me

Ga-Ram is a half-breed between a demon and a human, requiring periodic absorption of sexual desire to stay healthy. However, his constitution only allows him to absorb male sexual energy, which he finds utterly repulsive. After enduring it for so long that his health deteriorates, he gets scolded by her older brother. Terrified by his threat to hand him over to a perverted old man if he doesn't consume someone's sexual desire, Ga-Ram promises to try consuming the sexual desire of the classmate sitting next to him at the academy he'll soon attend. But wouldn't you know it, that classmate happens to be Jae-Chan, his childhood friend he's grown distant from...? (Source: Naver Series, translated)