Fics like Isekai demons of the multiverse

Two souls manage to isekai themselves into very familiar characters... only to find out that somehow, the characters they were inserted into are dead. But upon finding out that their deaths equals having powers, they decide to not only rule not only the entire hellscape, but probably the whole multiverse! And trying their luck at some wonderful female companions along the way. Two opposites, soon to be brothers in arms, work together to rule all! And with even a robot companion that may have some girls on the side... it's sure to be a chaotic mess... probably of DOOM!

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