Saijaku na Boku wa "Kabenuke Bug" de Nariagaru

The series follows Henry, who is a weak young adventurer trying to earn money for his younger sister. Henry's weak "Evasion" skill gets him kicked out of his party. However, he discovers a glitch that allows him to use "Evasion" to clip through walls and earn the first-time clear reward infinite times. By doing this, he rises from the bottom by boosting his stats and collecting rare items.