Thus Spoke Kishibe Rohan
Episode 5: Millionaire Village (1x1)
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Rohan Kishibe accompanies Kyoka Izumi, a manga magazine editor, to buy a mansion at a village far off from civilization. They soon discover the village is home to a group of millionaires who had all mysteriously become rich at the age of 25. Rohan and Kyoka enter one of the houses, only to realize that they are trapped by a mysterious power that won't let them progress unless they follow specific rules lest they suffer the consequences.