Saitei Rank no Boukensha, Yuusha Shoujo wo Sodateru: Ore tte Kazuawase no Ossan ja Nakatta ka?

A breakthrough in energy research—an experiment designed to harness the power of artificial black holes and white holes—ends in catastrophic failure. Instead of unlocking a new fuel source, the project tears open a rift to another dimension. This is no parallel utopia, but a realm teeming with monsters, a savage world spilling its horrors into our own. In the wake of the catastrophe, humanity discovers that certain individuals can absorb the monstrous energy and wield supernatural powers. D믭 the "Awakened Ones," these newfound heroes are conscripted into service, forced to fight for five long years before they can reclaim their freedom. Koosuke Igami is a thirty-five-year-old adventurer of the lowest Class 3 ranking, a man who has spent nearly half a decade scraping by on the fringes of glory. With his mandatory service finally drawing to a close and only three months remaining, retirement is tantalizingly close. Yet fate has one last trial in store for him. Assigned to shepherd a team of prodigious but reckless high-class rookies, Koosuke finds himself burdened with the very successors who outrank him. As the veteran who has seen too much and the novice leader who knows too little, Koosuke must navigate the treacherous politics of his party while surviving the escalating monster threats. But his quiet twilight as an adventurer might be anything but peaceful, because the monsters are growing bolder, and his young charges are about to learn that experience outweighs any rank.