DxD: System of the Harem King - Chapter 84: Sacred Gear

An angel made a mistake, resulting in Shiihara Daiki’s death. In order to hide the mistake, he was then sent to a different world. The angel will grant him one wish as a payment for keeping it a secret. Daiki asked for a Heavenly Castle floating in the sky without hesitation.

Suddenly a floating castle appeared in the new world, which causes confusion amongst the people. They attempt to contact Daiki in various ways. A country tries to steal it by force, while another seeks to befriend him. What in the world would Daiki do?

While reading a book, a sparkle of light disappeared. And, as it did, a message appeared.

After you’re awake but find yourself looking like a character in a game and came to a strange place, is this a different world or a game? Is it a rebirth or a cross over to another world? Everything needs to be explored by yourself!

- Description from Novelupdates

What? He’s transmigrated into an apocalyptic novel?

What? He transmigrated into a white lotus?

What? The white lotus killed the main character shou (bottom, uke) and even proudly became a mistress?

Oh, luckily the white lotus in the apocalypse has a thick thigh to hold on to (someone to rely on).

What? This was actually an apocalyptic rebirth revenge story?

What? The thick thigh was actually a really big cannon fodder?

Therefore, this is the dramatic story of a man who transformed into a white lotus struggling to survive in an apocalyptic rebirth revenge novel, trying to avoid the reborn pig’s foot (the original main character), and trying his best to get away from the cannon fodder gong (top, seme).

- Description from Novelupdates