I Found a Belt in Honkai Impact

"To deal with Honkai, we still have to use the power of the Valkyrie (show the card)"
"Isn't it because you don't have a knight card? Forget it, cerebral palsy! You can go!"
"You are cerebral palsy!"
All in all it's a delightful journey for the mouth-smelling belt with the protagonist, and that's it.
The cover has nothing to do with the content (probably), no mother-in-law plot (determined), there is a brief transformation (becoming a Valkyrie battle) plot (attention), cute new works (serious), above.