The world is in the early stages of a "weird recovery", with high-dimensional creatures invading reality through "memes".
Shen Qing discovered that her cousin was an evil god. She found that every "arrival" of her cousin required a sense of ritual, so she used square dance music to destroy the chants and used inferior milk powder to destroy the sacrifices.
It turns out that the best way to deal with Cthulhu is to make him vomit milk.
Now the problem is, for the sake of world peace, she must become the monster's full-time nanny and find a way to make him "accidentally" vomit once a day.