Responses
Yeah! The parent story is Hello Gray Night Shade, and the spin-off is NEON. Runway no Yukue wo Shiritai ka is the sequel of that. Idk why that’s the only one that was translated.
You can read more about them here:
https://www.mangaupdates.com/series/wz18i93/hello-gray-night-shade

I hope the prequel and parent story get scanlated soon :’)