Love and Teyvat? No, Gaming in Teyvat!

Lin Yuan, a professional homebody, a social waste who spends all day cooped up in his rented room? Or an ancient dragon? An ancient dragon currently sitting at his computer, playing Genshin Impact?

In a great battle a thousand years ago, he was left with a lingering injury. He could only transmigrate across countless worlds in search of a cure. But as that force continued to devour the source power within Lin Yuan, he grew utterly exhausted from transmigrating to other worlds. At last, he fell into Teyvat, the final otherworld, and sealed away his source power. He placed his last hope in this world...

(An ancient dragon from the cosmos descends upon this place.) Will this be his final (grave)?

(The synopsis is weak and limp. Gentlemen, please move on to the main story.)