I really fucking hate it when a manga centers its plot around a FEMALE secondary character instead of the main protagonist himself. Hopefully this manga isn't that.
If they are not banished from the party, they are banished from the guild. If they are not banished from the guild, they are banished from the family. If they are not banished from the family, they are banished from our world to go Isekai.
I really don't like openings like this one, because they rely on literally everyone in the world (or at least the entire town/country) being a hilariously evil cretin.