Post-canon. After everyone returns from the Beltline, Sakura talks with Kazuki about what Fuuga is to him. Kazuki finally accepts it.
She looked at him with a faint smile. "You called us back together."
"I didn’t mean to hold you, after," Kazuki murmured, half apologetic.
Her glance turned direct. "Didn’t you? After fighting so hard to reclaim us?"
Saizou has been watching Kazuki and the others only from a distance, and Kazuki finally corners him and convinces him that his proper place is with them again.
Kazuki felt a stray breeze brush his cheek and sighed. Saizou seemed determined to be the most troublesome one of all for him.
Juubei had been the first to detect him shadowing them, never coming close, only watching, but never leaving them. Kazuki had tried, once or twice, to drift closer, but every time Saizou slid away. Thinking about it, Kazuki didn’t suppose he was actually surprised.