Sucker punch

(Koneko/harem x Abused/cheated male reader)

It all begins with a man and a woman, both yearning for love. Their connection is fleeting, and as time passes, she becomes a mother. The father discovers the child but is driven away by another man.

Years later, the woman has a daughter and is content with her life, except for the boy she kept but didn't believe would fit into the family.

One day, she decides to abandon the unwanted child in a park, and the man agrees. The boy, now four years old, is taken by a mysterious figure and disappears.

Five years later, you find yourself part of "Project Mix Breed," the sole survivor in five years. Tests indicate no apparent changes; you're still human. Unfortunately, the experiments take a dark turn.

A compassionate figure with crimson red hair intervenes, saving you from a dire fate. As you wake up in a new environment, fear and confusion overwhelm you. The man introduces himself as Serzech, offering a second chance at life and dispelling any notions of experimentation.

As you slowly build trust, Serzech becomes a comforting presence, akin to an older brother.