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

a brief description of the manga 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 !?