They're All Magical Girls, So Why Am I the Jiahao?

(I've been a Jiahao myself, I'm not making this up.) Amamiya Haru transmigrated to a world of magical girls and awakened a System. As long as he was Jiahao enough and could be Jiahao to the magical girls, could he become a godlike Jiahao? All right, all right, so he's a god-tier tycoon? To become a god, Amamiya Haru began his Jiahao antics. Before him stood a magical girl who had endured years of bullying, lost her will to live, and decided to blow herself up along with a monster. Amamiya Haru pointed the umbrella in his hand at the monster. "When I go out in the rain, I bring a blade, not an umbrella. An umbrella would only slow down my draw." "A tycoon descends from the heavens, wrathful and fearsome!" Just as the magical girl thought she'd run into a chuuni and prepared to die, the umbrella in Amamiya Haru's hand turned into a streak of light and pierced the monster before them. "Wait... you can really do that?!" "The way you're looking at me, you've fallen for me, haven't you? The weak will never earn a king's favor!" [You were Jiahao to a magical girl and gained the Heaven-Splitting Quickdraw Technique!] After Amamiya Haru had been Jiahao to one magical girl after another, he suddenly noticed that the way they looked at him was getting stranger and stranger! "All these Jiahao things you've done were just to encourage me (us)!"