Tagged harem-seeking protagonist

What would you do if you could summon your favorite anime characters into reality? For Toma, that question suddenly becomes very real. After being transported to another world, he obtains a mysterious Summoning System capable of exchanging points for abilities, equipment, monsters, and items from countless fictional worlds. His first Random Summoning Coin gives him Tohka. His card packs can contain monsters like the Blue-Eyes White Dragon. And mysterious Dungeon Keys can send him into entirely different worlds to complete missions and obtain even greater rewards. Magic? Battle Aura? Monsters? Kingdoms? None of that matters. Because while everyone else is limited by the rules of this world, Toma has the entire multiverse behind him.

A Darker Take on Detective Conan When the washed-up detective Mouri Kogoro accidentally gains access to a mysterious system, his life takes a dramatic turn. Once dismissed as a bumbling fool, Kogoro begins a transformation into a cunning mastermind. In a world where crime is not a game but a bloody, relentless reality, he unravels enigmas shrouded in darkness and exposes humanity's deepest evils. Guided by the system, Kogoro’s methods become sharper, his cases deadlier, and his victories intoxicating. But truth alone isn’t enough for him—wealth, beauty, and power also drive his ambitions. As he dives deeper into a criminal underworld filled with deception and peril, the lines between justice and personal gain blur. Will Kogoro emerge as the ultimate detective or be consumed by the darkness he seeks to conquer?