Ｓ級冒険者が歩む道 ～パーティーを追放された少年は真の能力『武器マスター』に覚醒し、やがて世界最強へ至る～
S-kyuu Boukensha ga Ayumu Michi: Party wo Tsuihou Sareta Shounen wa Shin no Nouryoku "Buki Master" ni Kakusei Shi, Yagate Sekai Saikyou e Itaru
The adventuring party Sacred is quickly becoming famous for its incredible heroic exploits—and its supremely talented leader, Sasha. Almost no one remembers that Sacred ever had a co-leader: Hyse. Once Sasha's childhood friend, he was booted from the party, reduced from his already tenuous position as workhorse to plain deadweight. Devastation at the betrayal and shame over his own weakness drives Hyse to pour his bitterness into learning his Ability, an unfathomable power not even he fully understands. Now mistrustful but determined, Hyse steps up to take on the world—and the comrades who abandoned him. (Source: J-Novel Club)
