高校の修学旅行中バスの中で寝ていた高遠夜霧は、クラスメイトの壇ノ浦知千佳に起こされて目を覚ました。すると――そこは異世界で、目の前にはドラゴンが迫ってきていた！
彼らのクラスを召喚したのはこの世界で絶大な権力をふるう《賢者》の一人で、クラスメイト全員が《ギフト》と呼ばれる能力を受け取れるはずだったが、二人を含む何人かは運悪くこれを受け取れず、足手まといとして切り捨てられたのだった。
いきなり大ピンチの主人公！ と思いきや、実は夜霧は元々この世界の基準では計れないほどの《即死能力》を持っていて―――
Growth cheats? Infinite magic power? The ability to utilize all archetypes? What’s the point if instant death ends everything with a single attack?
High school senior Yogiri Takatou was on a school field trip when he woke up to a dragon assaulting his sightseeing bus, with the only ones still on the bus being him and his female classmate, the panicking Tomochika Dannoura. Apparently the rest of his classmates had been given special powers by Sion, a woman who introduced herself as a Sage, and escaped from the dragon, leaving those that hadn’t received any special powers behind as dragon bait.
And so Yogiri was thrown into a parallel universe full of danger, with no idea of what just happened. Likewise, Sion had no way of knowing just what kind of being she had summoned to her world.
