Witch Trial, So I Killed the Witch Factor

This isn't what a corporate slave magical boy's retirement is supposed to be like! You should be living a peaceful life in the city. Playing cards at a nursing home now and then, working a normal job like a normal person, and eventually finding a kind, honest person to marry... and living happily ever after! But what are you doing? Picking on the strong but dim blue-haired girl? Tricking the landmine girl with a heart of gold? Outwitting the shut-in princess? Throwing punches at the abused street girl? Watching the magical girls, who have powers just like him, pull one outrageous stunt after another, each one enough to send his blood pressure soaring, Yu Zhi Yan blacks out. This is what a corporate slave magical boy's retirement is like...