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

Allen wants to become a skilled swordsman, but he isn't very good at it. He loses a high-stakes duel and considers quitting when a mysterious individual offers him 100 million years of training with one button press. However, when he presses it multiple times, what happens?

Ichioku-nen Button wo Renda shita Ore wa, Kizuitara Saikyou ni Natteita: Rakudai Kenshi no Gakuin Musou began as a web novel on Shousetsuka ni Narou on February 1, 2019. Kadokawa has released a revised and illustrated version of the series since October 19, 2019 under its Fujimi Fantasia Bunko label.The series has been published in English as I Kept Pressing the 100-Million-Year Button and Came Out on Top: The Unbeatable Reject Swordsman by Yen Press under the Yen On imprint since November 9, 2021.