This one doesn't pretend. Maken-Ki! puts a Maken in everybody's hands, builds a whole dueling academy around it, and then spends its budget on everything except the duels, and the people who love it knew that going in. Takeru Ohyama transfers into Tenbi Academy with the standard perv-with-a-heart setup, gets adopted by the Maken-Ki committee, and immediately has Haruko's childhood-friend claim, Inaho showing up announcing she's his fiancee, and Kodama Himegami's icy disinterest all stacked on top of each other. The art holds up better than the writing does, the cast is voiced like the studio actually cared, and the fanservice is animated with a level of attention the plot never gets. If you want a magical school battle series with stakes, go watch Freezing. If you want the harem comfort food that knows exactly what it is and never apologizes, this is the one you keep in the rotation.
Takeru transfers to Tenbi Academy expecting typical high school chaos: cute girls, awkward moments, the usual teenage fantasies. What he gets instead is something far stranger. Every student at this school carries a Maken, a magical artifact that transforms them into warriors capable of devastating combat. The catch: Takeru has no idea how to use one, and worse, he has no natural affinity for magic whatsoever. Surrounded by capable fighters and increasingly aware that combat ability determines social hierarchy, Takeru scrambles to find his place. He's got confidence and determination in spades, but that only gets him so far when everyone around him can literally fight with supernatural power. Between attempting to master a Maken, navigating crushes with female classmates who could flatten him in seconds, and uncovering why this school exists at all, Takeru's plan for a peaceful year dissolves completely. What emerges is part training montage, part romantic comedy, and entirely chaotic. For viewers who want action mixed with humor and don't mind the fanservice, this delivers exactly what it promises: underdog determination meeting absolute absurdity.