Testamentofanewsisterdevil Stories

Kaito Kusanagi is a young boy who wanted to live a normal life, but became experimented on by the Hero Clan, becoming Half-Kaijin, but he escaped and was taken in by a loving family along with two girls who were also adopted. That's how Kaito's life changed.

(Union Academy X Tekken 7) After the defeat of an evil named Azazel, Jin Kazama got missing, but the war between Mishima Zaibatsu and G Corporation continues. And making things worse, Heihachi has returned to claim his rightful place. What will happen next?