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Kumitantei: Old-School Slaughter backdrop

Kumitantei: Old-School Slaughter

Mango Factory/2026/Adventure

Kumitantei: Old-School Slaughter

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Summary

Kill each other...for science! The class of '89 is trapped in an elite school killing game. Investigate, solve, and expose your classmates in Kumitantei: Old-School Slaughter, an episodic murder-mystery ADV card-battler inspired by retro anime.

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