MTL - Mystery Makes Me Strong - Chapter 13 Having children is difficult to teach

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?

My Beautiful Teacher tells the story of a university graduate Qin Chao who can’t seem to find a job and is in a downward spiral in his life. Then one night as he walks home from another failed job interview, a vase hits his head, making him get possessed by an old and powerful evil spirit sealed in that vase and following another incidents, inadvertently saved a mysterious university teacher Su Ji, thereby opening his path to cultivation, he also manages to get a job as a security guard at Guangyuan School. A series of adventures then took place as he deals with all kinds of supernatural beings.

Echoes of the Lost Elf – Back Cover SynopsisA legend long forgotten. A war long past. A magus who vanished into history.A thousand years ago, Historias Everglen, the greatest magician to ever walk the earth, mysteriously disappeared after leading the world to victory in the First War against the Void. The high elf, creator of Castellas Academy, the most prestigious magic institution, faded into myth—his name spoken only in whispers, his fate unknown.But history does not stay buried forever.When a group of young students, lost in the Everglen Forest, stumbles upon an enigmatic figure in the heart of the ancient woods, they unknowingly awaken an echo of the past. Unrecognized, Historias decides to return to his own academy—not as its master, but as a student. Beneath his youthful guise lies an immortal being who has spent a millennium mastering magic, swordsmanship, and alchemy in solitude.As shadows of the Void begin to stir once more, the world stands on the brink of another catastrophe. Enemies rise, secrets unravel, and forgotten legends take their place in the present. But one question lingers:Will the world recognize its lost protector before it’s too late?

He was the continent’s strongest and most revered alchemist, Ye Zifeng. He was under one person and above millions. However, due to an unpredictable event, he had died. After his rebirth, he had become the supertrash of the Ye family and suffered disgrace. To make matters worse, he had an argument with his fiancé that led to the break off of his engagement. In this second life, he will work to change his own destiny. He vows to return to the peak of the world, trample on those who laughed at him and rewrite his legacy!

- Description from Novelupdates