Pretty interesting take on the banishment trope. Instead of kicking him out or exiling him cause they think he's worthless when in fact he does everything or something like that they removed him from the party cause they love him. When they say their party's strength won't be affected by his absence they are 100% correct. The mc isn't useless, they're all just extremely OP. Hell, the female hero literally solo'd the demon king. It doesn't take long for them to state their feelings either. It's honestly refreshing.