Mortal Cultivation - Chapter 326

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!

After breaking up with his girlfriend, he accidentally acquired a genius system and rose from there against the heavens, becoming invincible..

- Description from Novelupdates

An ordinary (?) grandfather, Choi Chuntaek. In an effort to protect his granddaughter, he started the virtual reality game 'Arkstar.'

Then... he accidentally obtained a legendary class?