FictionTraveler

Zero was a victim of the war of harem.

Two years of his journey as a demon in a world resembling a game he once played ended in a tragic death. 

Fortunately, his soul returned to Earth. Now, he was no longer Zero, the shadow villain, but Ernest, a runaway child haunted by an inferiority complex. 

Until ...

[You must perform sexual cultivation if you want the curse within you to be lifted.]

"We need to get married so we can do it."

"You wanted us to get married so you could make me your furnace?"

He ended up being a furnace for his new wife.  

But, behind his role as a furnace husband, he gathered strength from the shadows to prepare for another catastrophe that would come.

After all, he returned 10 years before the Earth was destroyed.
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Pov 3 
Male main character.

Note: English is not my first language. Feel free to criticize.

Table of The Return of the Shadow Villain: My Role Is My CEO Wife's Furnace

Table of contents

Volume 1