Synopsis: I Kept Pressing the 100-Million-Year Button and Came Out on Top

Due to his mediocre grades, Allen was nicknamed "Reject Swordsman" by his classmates at Grand Swordcraft Academy. However, his luck changes after he acquires a mysterious button that allows him to participate in an unconventional training program in a parallel universe, where he can learn a century's worth of knowledge with the push of a button. With renewed skills and rigorous training, Allen is now ready to showcase his true abilities and vindicate himself, despite his academic setbacks in the past.