If you like: tanlines, swimsuits, imoutos
You’re in luck.
The story is independent of UnisiS and UnisiS 2, although I do encourage you to read them if you haven’t before.
Translator: freudia
Typesetter: freudia
QC (kinda): AoC
(COMITIA108) [Chroma of Wall (saitom)] UnisiS3 [English] [Team Koinaka]
(コミティア108) [壁の彩度 (saitom)] UnisiS3 [英訳]