Hai to Genso no Grimgar level.15 (Overlap Bunko) [Light Novel]

[Machine Translation] I really don't know, everything.... When I came to, Haruhiro and the others were in the dark. Everyone could only remember their own names. The only person they could rely on was Merii, who for some reason had not lost her memory. Somehow, they managed to escape from the darkness and found themselves in "Alterna," a place that had been destroyed. I just need information. Haruhiro and his friends, who have barely escaped from the city, scramble through the frontier of Grimgal, making full use of the skills and abilities that have become ingrained in their bodies. Finally, they meet a man who is a member of the Royal Army of Arabakia, which has come to take back Alterna...? The curtain rises on an adventure tale born from the ashes - ENDGAME!

ほんとわかんないな、何もかも...。気がつくとハルヒロたちは暗闇の中にいた。みんな自分の名前くらいしか覚えていない。頼りになるのは、なぜか唯一記憶を失っていないメリイだけ。暗闇の中からどうにか抜け出すと、そこは壊滅した「オルタナ」だった―。とにかく情報が欲しい。命からがら街を離れたハルヒロたちは、体に染みついていたスキルや能力を駆使して、グリムガルの辺境を奔走する。そして、ようやく出会えた人間が、オルタナを奪還するべくやってきたアラバキア王国軍で―!?灰の中から生まれた冒険譚―ENDGAME編の幕が上がる!