Start in DxD as Motohama: Leveling Up in Another World

After dying, you wake up and realize you've been reincarnated as a background character who is judged as human trash.

The decision to change your destiny comes instantly.

Discovering that your identity isn't as simple as you thought, you feel favored by the heavens when you manage to become a powerful character.

Katase: You won't fool me. I'll expose you for the pervert you are.

Murayama: ...Thank you for saving us.

Issei: Motohama, what happened to you? How are you so powerful?

Rias: If you join my peerage, I wouldn't mind being yours.

Sona: You beat me in the game. That means you're now my fiancé.

Yasaka: Honey, Kuno wants a little brother.

Kaori Houjou: Shinji-kun, let's go on an adventure.

Kaede Kazama: Shinji-kun, thank you for saving me from that ball.

Rie Sawada: Shinji-kun, I'll wait for you. You'll be my future husband, fufufufu...

Changing known history and taking it in a direction not even his eyes could perceive, he didn't stop no matter what. Not even the other world was safe from his clutches.

Lexia Von Arselia: My hero, and my future husband...

Shinji advances without stopping.

“I, Shinji Motohama, swear here and now that I will reach the top of both worlds.”