The Young Master I Carefully Raised Became Obsessive - Chapter 12

Xia Lian, a 21st century military doctor died in an explosion and found herself transmigrated to the body a 12 year girl. Her mother died and her father abandoned her and her little brother for another woman.

«Until death do us part.»That was our vow.And she kept it... by driving her sword through my chest.I was a hero. A symbol. The one chosen by the gods to free humanity.I fought for her. For us.But in the end, it wasn’t the demons who killed me.It was the woman I loved.Helena betrayed me.I fell with my heart shattered and my blood burning between my fingers.But death wasn’t the end.I woke up in another body, in another world...No, not exactly.I woke up inside the very story she wrote.And now, I am Daven von Riesenhart:the bastard son of a marquess, a noble outcast with a name no one respects, and a life I never asked for.I no longer believe in ideals, in gods, or in happy endings.I won’t fight for others.I won’t die for anyone.This time, I’ll live only for myself.And if surviving means deceiving, betraying, or destroying...so be it.Even if it makes me the villain of this story.

In a world teeming with Titans, Colossals, Gigantic Monsters and Kaiju's, Erian who reincarnated makes his living collecting scraps of low-grade Defective Genetic Serum, realised he transmigrated along with his system.

Follow Erian as he grows to become the strongest Disaster Grade Titan with the help of his Titan System!

System, “You have a sickness. Moreover, you’ll have one in every world.”

Hao Ritian, “…”

System, “What’s wrong? Is there a problem?”

Hao Ritian smiled, “No, there’s no problem. I was just a bit excited.”

System, “…”

That smile intensified the system’s feeling of ominous foreboding. It has had this premonition since it learned the name of its host. Now it only prays that this is all its imagination!

Ps: Protagonist shou 1v1, the gong is always the same person.

- Description from Novelupdates