Gulleo Deureoon Alpha

Sang-Hyun, who manifested as an Omega belatedly after joining the organization. Since he’s manifested as an imperfect Omega anyway, he intends to hide it for the rest of his life, but…

*“Dad, please help me. No, wait, I’m fine…”

“…?”*

He had just witnessed Do-Yun—whom he’d raised like a son for the past ten years—in the heat. He’d thought Do-Yun was just going through a belated puberty, but to find out he was an Alpha! And a dominant Alpha, no less. Worried sick that Do-Yun might become sterile, Sang-Hyun offers his own back passage for Do-Yun’s sake.

(Source: Bomtoon, translated)