Living with a magical girl, but a weirdo cadre

Cong Yu, male, seventeen years old, is a student.
His hidden identity is a manager of the Monster Group, and he is currently on leave without pay to attend school for further studies.
I live in a villa area northeast of Fengdu. I live alone and my house is quite big.
I thought this kind of life would continue until I graduated from high school and college.
But the sudden intrusion of the magical girl changed his life!
"I am Cong Yu's dog! Woof woof woof!"
"Cong Yu, you don't want your true identity to be discovered, right?"
"I am the magical girl you corrupted yourself. You must take responsibility!"
Amidst the noise of many magical girls (questionable)...
Cong Yu didn't know what expression to show, so he could only smile.