I Transmigrated to Another World, and My Partner Weapon Is the Key of God

(Slice of life, comedy, supernatural powers, school. Aside from the Divine Keys, Honkai elements won't appear in the early part of the story.) My name is Po Xiao. The night before, I was still grinding the Abyss. When I woke up, I had transmigrated to another world. The only difference between this place and Earth is that people have bonded weapons. Normal people only have one, but I have twelve! What can I do with the first Divine Key, Skyfire, in a peaceful world? Why, barbecue, of course! Wait, what is that? No way! How did False God Otto show up too!? So I'm still in Honkai after all?