On the Question: How Is Magic More Fun Than Little Girls?
First: According to Qin Ni's research, the structure of a little girl's body is more complex than the basic structure of magic, so we need to keep exploring it.
Second: The goal of learning magic is to become stronger. The goal of becoming stronger is to flirt with girls. The goal of flirting with girls... It seems we already have little girls, and in the future they'll level up into lolis, young women, married women, and wives...
Third: If your spellbook and a little girl both fell into the water, you'd have to be out of your damn mind to save the spellbook.
In conclusion, little girls are way more fun than magic.
PS: The protagonist is a pitiful plaything who'll get pinned against the wall, kissed by force, and pushed down in all sorts of ways by girls from every walk of life.
So... even though I've become stronger, I've also become a little slut.
(This is a yuri novel. The previous volume covers some of the setting from the first volume of the main story. You can read it first, but the previous volume is a little chaotic, so you can also skip straight to the main story.)