Wortenia Senki (WN) - Volume 3 Chapter 9 (Towards the peninsula 9)

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?

History speaks of a famous Genius... a genius who at the start, no adult whished for their child to emanate.GORT FAIRBANG.That's the name.He was the son of the current village chief, the son who won awards and even headed out to prestigious schools in a grand manner.But one day, a few screws came loose in his head, and he decided to return to the poverty stricken village, throwing away his good cards for the live of nothingness!Crazy! Crazy!He must be insane, many concluded.But what they didn't know, was that this one-in-a-million-year genius, had returned with one sole mission in mind.And that was to SAVE HUMANITY!