After losing his girlfriend to a brave hero, Toru is cast out of his S-Rank party, left with nothing but heartbreak.

But fate takes a turn when he defeats a demon outside the city, breaking his hidden ability—[Experience Save]—and skyrocketing to level 300 in an instant!

Now far stronger than any hero, Toru embarks on a new journey. Alongside Kaede, a slave he frees, they form the Mangyu Brigade, conquer dungeons, claim legendary weapons, and help allies level up with ease.

As he rescues nobles, befriends legendary beasts, and thrives, his former party falls into decline. This is the rise of a level 300 warrior!