Genshin Impact: the Messenger of Joy Arrives in Teyvat

Mu Yan, who traveled to the world of Genshin Impact and became the Messenger of Joy, was bound to an evil system one day... So I completely let myself go. Wouldn't it be nice to do one bad thing and get two rewards? So… Balala holds an AK: Learning medicine will not save Mond! Keli: Is this the newly developed anti-city uranium 235 bomb? Go fry the fish! Youla: I didn't see Mu Yan when I went to take a bath today. I'll remember this grudge! His favorite person is the soft and icy Qiqi, his favorite drink is freshly squeezed coconut milk, and his hobbies are petting little foxes and... Unsheathing swords. In short, this is a joyful messenger who loves to cause trouble, a happy daily record in the continent of Teyvat. The writing is not very good because of the new author, so please be merciful. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.