In the first season, Haru had traded with Mei. Haru had kept the office job and the city apartment; Mei, the suburban home and a mother’s slow, fragrant mornings. They’d returned to their old bodies after seven days; the bargain’s magic obeyed its own rules. It did not, they’d found, mend what was fraying. It only revealed what the fraying concealed.
As of my cut-off knowledge date (01 March 2023), I couldn't find any information about a Season 2 for this series. It's possible that: fuufu koukan modorenai yoru season 2