Seijūrō Akashi was in a fairly good mood when he finally arrived home. Kuroko's birthday party had been the most fun he'd had since middle school. Sei was (relatively) sane again, he'd made peace with his former Miracles and their significant others, he'd began rebuilding his relationship with his Rakuzan teammates, he was now on cordial terms with Kuroko's new teammates, and had gotten Kōki Furihata's phone number. Yes, all in all, a very pleasant outing.
Naturally, of course, his father had to spoil Seijūrō's good mood.