Lol : After Being Blessed by the Happy Demon, I Became the Harem King

Devastating news from Runeterra: the female heroes have collectively ascended to the planet of happiness. Blessed by the demon of happiness, Fahn now commands wind and lightning. Zaun encounters a monster-like power; Jinx, despite her best efforts, is powerless against it. A single injection turns her blood into a thick, oily jelly, her heart pounding and her eyes sparkling. Piltover, enraged, launches a righteous crackdown, but Caitlyn betrays them, indulging in a dose of happiness hormones. Dopamine activates her nerves, causing her to lose control on the spot. The hormones are too pure, too potent; she's left weak and hunched over, wolfing down a train-sized bento box in her small room. Noxus is astonished and secretly copies the formula, but a clumsy experiment by the beautiful heroine causes the happiness hormones to spread like a plague, ensnaring the entire nation. The Katarina sisters, however, enjoy their blissful lives. Curiously trying it out, Lux transforms into a Demacian water sprite, dragging Fiora to be her sister, enthusiastically recommending Sona, and then, under the bright sunshine, pulling her underwater—"You're next!" Freljord unified the frozen plains, the three sisters united to fight the demons. Their combined strength was unbreakable, but unfortunately, Faen's power was too great, and they temporarily retreated, suffering a crushing defeat and forced to sacrifice everything. Ionia used gentleness to overcome strength; Venerable Karma sacrificed herself to the tiger. Irelia, disbelieving her brother's actions, fought a fierce battle that overwhelmed the seven armies, leaving them weak and powerless, yet still proclaiming their invincibility… (Word limit applies). ————————The Zaun arc includes some political development elements; the ending of the Zaun arc transitions to a pure harem fantasy adventure.