Source: https://kakuyomu.jp/works/1177354054922300995
Synopsis
For some reason, the adventurer boy named Ryu could not raise his level from 1 at all, no matter how hard he tried. One day, however, he was forced to take on the task of carrying luggage for a dungeon raid.
However, when the adventurers encounter a dragon in the dungeon, they slash Ryu’s legs and leave him behind. The adventurers had hired Ryu with the intention of using him as a [sacrificial stone] in times of danger.
However, Ryu’s predicament brings back his sealed memories and abilities, and he slays the dragon and returns alive.
When Ryu returns to the Adventurers’ Guild, he protests that he was left behind, but to his surprise, the guild master is also in on it.
With his overwhelming power in his hands, Ryu’s revenge begins…
Startup
Episode 1 – The boy whose leg was cut off and left behind (Stage Play)
Episode 2 – If you’re frustrated, raise your rank
Episode 3 – Rank up exam begin
Episode 4 – Rank up exam part 2
Episode 5 – Is it okay to pass the exam?
Episode 6 – But rank up is denied
Episode 7 – A cliché development involving adventurers?
Episode 8 – I will take revenge on the adventurers who have tortured me so much before
Episode 10 – [Harassment] I was prohibited to buy materials
Episode 11 – Harassing by stealing favors
Episode 12 – Hunting is just a matter of time
Episode 13 – The end of foolish adventurers
Episode 15 – The declining Adventurers’ Guild
Episode 16 – Ryuujin, enslaved
Episode 17 – Ryuujin becomes an adventurer
Episode 18 – Ryu forms party with a former classmate
Episode 19 – Ryu was abandoned by his childhood friend who is also his fiancee
Episode 20 – Childhood friends’ party regret
Episode 21 – Childhood friends’ party reflection
Episode 39 – Put her in the passenger seat
Episode 22 – Reuniting with the main cause of trauma
Episode 23 – Forming a party with Big ?!
Episode 24 – Being left behind again !
Episode 26 – Ryuujin’s true identity