Exchanging Villainy Into Love System [BL]

Bai An Cheng was a mercenary-for-hire in the modern era of advanced technology. He's a bio-engineered human thrown away in an orphanage for reasons still unknown. There, he learned how to be a mother, a big brother, and a protector for his younger 'siblings'. After an attempted kidnapping of his siblings which resulted him killing the perpetrators, he's scouted to be a mercenary/assassin for an underground organization. Years later, Bai An Cheng died due to the explosion of his own bomb. After bonding with a system of his own, he's now world-hopping and exchanging villainous works into love.

Together with his system, he travels alone and met again and again with this lone soul that seems to follow him through the worlds. Just who is he?!

Edit: This is not a translation, this is my original work.