Exiled by My Sword Saint Brother, My Skill Was "Membership"

Synopsis

At fifteen, my twin brother received Sword Saint, the skill every swordsman dreams of. I got Membership. Nobody had even heard of it. By sundown I'd lost the duel, lost the heir's seat, and been thrown out of the house. Then, lying half-dead by the roadside, I saw it. [Membership registration complete. Sign-up bonus: 100P] Earn points. Buy strength. Buy skills. Buy anything. ...Maybe this skill isn't a dud after all.