My Instant Death Ability Is Overpowered

Original title: 即死チートが最強すぎて、異世界のやつらがまるで相手にならないんですが。

Yogiri Takatou missed a few things during his nap. When he wakes up, he finds out that he and his entire class are in another word and must now team up with Tomochika and fend off danger with his Instant Death ability. If he can keep his eyes open, that is...