My Brother’s Omega

SUMMARY:
Do-yoon has cared for and loved Su-ah since they were children, believing Su-ah to be his younger sibling. However, when Su-ah goes into a heat cycle, Do-yoon finds himself caught up in a relationship with him. Although Do-yoon is a beta, he is determined to help Su-ah, who is struggling with the heat. But this is the first time he’s been overwhelmed by an omega. Is this truly just a heat cycle?

“I’ll try harder because you like it…”