An ordinary high school student and a flower-growing uncle join hands to kill demons and plant flowers.
High school students: poor grades, poor appearance, no figure, so what, they still seal away demons, kill enemies with their own hands, return with bloodthirsty, and dominate the world.
Uncle: It's okay, I'm the master upstairs.
--------------------------------------------------
It looks bad, are you sure? Poor grades, are you sure? No figure, are you sure? Fraud!
Ordinary doesn't mean incompetent, maybe it's just hiding one's identity.