World's Fastest Level Up (Light Novel) Vol. 2

RIN TACKLES NEW TERRITORY IN HIS RACE TO THE TOP!Having awakened to a skill that allows him to level up faster than anyone in the world, Amane Rin challenges an untrodden dungeon called the Remote Magic Tower. There, he embarks on his most challenging quest yet, where he grows even stronger. Meanwhile, evil lurks toward his beloved sister Hana! What's Rin to do?