MTL - Little Mermaid Dressed As a Scientist - Chapter 54

When he did not know her true identity, he treated her very badly, he disliked her too much, she was not elegant enough, she was in the way...Only later did he realize that the woman was his legal wife! He repented, tried to recover her feelings, but she was determined to divorce him.

Calamity descends upon a a tranquil world in the black of night, transforming it into a death game! This a a true apocalypse, but this is not the end of humanity!

- Description from Novelupdates

Our protagonist Caam is a man from Earth that was reincarnated into this world as a demon. In order to survive, he spared no effort in avoiding the sparks of battle and without noticing it, he became strong himself.

Honjou Kaede was invited by her friend, Shiromine Risa to play a VRMMO.

I don’t hate games, but painful things are a little……no, I hate it very, very much.

Eh!…the pain would be reduced if I placed stats on defense power?

Then, the only place where I can place it, is there right? Right?

Solidly fortify everything into defense, now here I come!