Failure Frame

Mimori Touka, a high school student summoned to a fantasy world as a hero, only to be deemed useless due to his E-rank ability and banished to a deadly dungeon. He discovers his "worthless" skills are actually abnormally powerful, leading him to seek revenge on the goddess who summoned him and his classmates who abandoned him. The series follows his journey as he becomes a powerful anti-hero, gaining allies and growing stronger while plotting his revenge.