's manga / #Top tier(5)

A beta who wants to be an omega lives with an alpha hunting for a beta serial killer who wants to be an alpha.

This was recommended to me... and my god am i so thankful. This tells the tale of a man who survives a tragedy and decides to hold a service to honor dead. He is discovered and subsequently observed by a merman, who then decides to keep him and regenerate him each time he is injured. He soon draws the conclusion that having a relationship with this merman caused his immortality, so he tries to search for its cure. Only then does he realize that the answer was right in front of him all along. A tale heavily influenced by merfolk legend, of fear, of love and of betrayal. And above all else, yearning.