Imamiya Satoshi, known to friends as “Sasshi,” grew up in Osaka’s Abenobashi Shopping Arcade alongside his childhood friend Asahina Arumi. When Sasshi’s family bathhouse shuts down and is demolished, and Arumi’s family relocates to Hokkaido, the once-stable rhythm of their lives crumbles. Amidst this upheaval, a distortion in reality thrusts the two into a bizarre parallel version of Abenobashi, unchanged in name but altered in every detail. As strange events unfold, Sasshi must uncover their meaning in order to pursue a goal that remains elusive to him.