I Was Just Logging In to Power-Level, So How Did I Become Your Mom?

Jiang Xu has a complete guide on how to raise the strongest magical girl.

All you need to do is find a magical girl who's reasonably cute, teach her how to flirt with other girls, how to satisfy her coworkers' desires, and how to keep them wanting more so they'll gladly do things for her.

Then, when it's time to fight monsters, all you have to do is wave your hand, and a whole crowd of magical girls will rush to destroy them for you.

What?

You want to know what to do if they demand a reward after defeating the monsters?

Isn't that a good thing? They get what they want, and so do you. As long as you're not such a useless bum that you lie around doing nothing the whole time, you'll come out ahead.

Huh?

You say all I do is talk theory? What a joke! See this magical girl training game? Watch me raise a human-shaped succubus in no time!

Years later, in the bridal suite of the strongest magical girl of the era, Jiang Xu looked at the white-haired girl sprawled on top of her and gave an awkward laugh, trying one last time to put up a struggle.

"Xiao Wan, could you get off me so we can talk this through?"

The strongest magical girl, Cen Wan, replied,

"Nope, Mom. You used my body to flirt with girls everywhere. Now that I've finally turned you into a girl and kept you by my side, I don't want a bunch of extra moms showing up."

That night, Jiang Xu lay down at the start and stayed there to the end, becoming the useless bum she'd always talked about.

"You're so adorable~ Mom... No, I should call you darling now~"

As Jiang Xu lay there like a corpse, she couldn't come to terms with one thing, even on her deathbed: how had the random girl she'd picked turned out to be such an unloved child?