My disciple has become the strongest human before I knew it, and I, a master with no talent, was mistakenly recognized as the strongest in the universe beyond that

Takumi was banished from the party and lived alone in the mountains. Leia, who claims to be a disciple of Alice, a girl who once protected and cared for him, came to him.. She has become a disciple of Takumi, who is rumored to be the strongest in the universe.. Since then, a dragon, a great sage, and a goblin king have visited Takumi, who has no talent, and is suspected to be a demon king !?