The Merman's Dilemma

Tactical Commander (White Lion Alpha) x Top Tier Beautiful Combat Force Assaulter (High Class Merman Omega).
Both of them were once test subjects of a research lab, depending and at the same time using each other for their own "benefits". However, because of a misunderstanding, White Lion was injured by Merman. He keeps saying that he'll get revenge against him, but when they met again, he can't seem to do it. Instead, he can't help but protect his little merman...