Prologue: Daiki and his Little Brother Reincarnated into Yu-Gi-Oh! 5Ds

Daiki and his little brother, Haru, were born as pirates in the real world and have their own ship. They were orphans because their parents died. One day, a storm hits which their pirate ship to be sucked as Daiki and Haru went inside their pods to be safe. What they don't know is that the Crimson Dragon have chosen Daiki to be its host and gave him multiple dragons and deck and runner of his own. Then, suddenly they were reborn as Kaeya and Ren, and they were adopted by two parents both male. One day, Kaeya will have an adventure of the lifetime as he duels to save lives and stops evil. Not to mention, he will have many boys falling for him.

This includes:
bxb
blharem
Smut/Depending on how the story goes.