First encounter

Yukio will be 4 years older than Rin .

Also when rin was born he was taken to gehenna .

Yukio will know that he has a brother and that brother was taken into gehenna.

One day Yukio had a mission where he ran into a little demon and decided to take care of him, without knowing two very angry demon kings were looking for the boy . How will Yukio react when the two demon kings come to retrieve their little brother and Yukio finds out that the little demon he was taking care of was his little brother . Will Rin stay his new brother or will go with the two demon kings .

Soooooo nvm everything will be on most likely never get next part I completely abandoned everything so yeah