Issei's perversion isn't a joke the show is laughing at you for watching, it's the actual engine of his character development, which means every harem moment doubles as genuine growth. The fanservice never apologizes because the show doesn't need to: it commits fully to what it is, and that confidence makes the comedy land harder than any ecchi that winks at the camera. You're here for the girls and the laughs, and it delivers both without pretending to be something else.
Issei Hyodo thinks his luck is about to change when a beautiful girl agrees to go on a date with him. That optimism dies the moment she reveals herself as a fallen angel and leaves him for dead. His salvation comes from an unexpected source: Rias Gremory, his impossibly attractive upperclassman, who resurrects him as a devil and claims him as her servant. Now Issei finds himself caught between warring supernatural factions, stripped of his humanity and forced into a world where angels and demons have real political stakes. His new life comes with responsibilities he never signed up for, dangers that keep escalating, and a master who's far more complex than her perfect exterior suggests. What starts as pure comedic absurdity transforms into something with actual weight as Issei discovers that supernatural politics aren't a game. His inexperience and perverted nature clash constantly with serious stakes, creating a strange balance between laugh-out-loud moments and genuine peril. The series pulls viewers through escalating battles and surprising character depth, all while maintaining an irreverent sense of humor about the whole situation.