Okay, yeah, this is great. Normal mangaka would just have had Sora move in and then provide the flashback (if at all), but instead dedicating half the chapter to yearning reminiscence? Yeah yeah, Subtext, suuuuuure.
Also, not that hot a take: This is honestly what Childhood friends should be about. I couldn't care less about what brat you spend your early, barely-verbal years in the sandbox with, but somebody who's been with you trhough thick and thin during all your formative years? That's top, pinnacle, apex, dare I even say peak.