I love how the band is breaking up in the background. It shows how preoccupied Kyo is; a big fight happening in front of him, potent changing the life trajectory of these people and he’s too caught up in something else to even notice.
They have interacted with Ichikawa at least a few times and he was honest with the mother (several points there) when Moeko tried to cover for him by saying that he was Moeko's BF. I think they approve of him and if it was anyone else it would have went so well, especially since they weren't informed in advance.