• Book Name: Trigger Keeper Manga
• Genre(s): Action Sci-Fi
• Author(s): Ashihara Daisuke
• Status: Completed Download Manga
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Summary: Trigger Keeper (トリガーキーパー, Torigā kīpā) is a two-part one-shot created by Daisuke Ashihara. It is the first precursor to the World Trigger manga series. (from the World Trigger wiki)