I hit the button for a million years and before I knew it, I was the strongest

I hit the button for a million years and before I knew it, I was the strongest is a Manga/Manhwa/Manhua in (English/Raw) language, Action series, english chapters have been translated and you can read them here. You are reading I hit the button for a million years and before I knew it, I was the strongest chapters on VipToon.Net, fastest updating comic site. The Summary is

Allen is a boy who is despised as a failed swordsman. One day, desperate for a duel with an elite swordsman who bets on leaving Kenjutsu Academy, a mysterious hermit asks him if he will press the “100 million year button”. Can the mysterious object really help him train for 100 million years?