My Instant Death Ability Is So Overpowered, No One in This Other World Stands a Chance Against Me!, Vol. 5 (light novel)

Having overcome countless trials (without much difficulty), Yogiri and Tomochika finally managed to reunite with their classmates in the capital. But between the efforts of Ayaka, a synthetic classmate who swore revenge against her fellow students, the meddling of Sion, a Sage determined to cull the weak and produce a new superbeing from their class of candidates, and the revival of the Dark God Mana, the majority of the class-not to mention the entire capital-were ultimately wiped out.