Ichioku-nen Button wo Renda shita Ore wa, Kizuitara Saikyou ni Natteita: Rakudai Kenshi no Gakuin Musou

一億年ボタンを連打した俺は、気付いたら最強になっていた ～落第剣士の学院無双～ • I Kept Pressing the 100-Million-Year Button and Came Out on Top: The Unbeatable Reject Swordsman • Publishing

Synopsis

Allen gets such poor grades at Grand Swordcraft Academy that his fellow students have dubbed him the "Reject Swordsman." But one day, he is granted a mysterious button that, when pressed, will give him one hundred million years to train in an alternate reality. With an ungodly amount of practice under his belt, the world is about to see what this underachiever can really do! (Source: Yen Press)

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