An Heir for the Dragon

Kazuma Kiryu was lucky to survive his cancer a second time. He was supposed to live a stress-free life at last. But the Tojo Clan had a secret weapon that survived past the destruction of the headquarters. He met this weapon once a very long time ago. Now this weapon is going to turn his life upside down. Can he still reclaim a stress-free life?

This takes place right after Infinite Wealth ends. I have no clue how long this fiction will go, or how often it will update. If it's popular, it may update a lot! Enjoy!