The Healer Who Was Banished From His Party, Is, in Fact, the Strongest - Season 1 Episode 2
Regarding the Banishment, Which Was, in Fact, the Start of a New Voyage

Laust had a very painful youth. Despite his best efforts as an adventurer, he was branded an "ignoramus" and lost confidence in himself. Then when wandering outside the city one day, he met a girl who inspired him to keep trying. But who exactly was she?