Mizuno launched her Rainbow Days manga in the February 2012 issue of Bessatsu Margaret, and ended it in March 2017.
The manga began with a one-shot in Betsuma in January 2018, before launching as a full serialization in June 2018.
The December issue of Shueisha’s Bessatsu Margaret (Betsuma) magazine revealed on Friday that Minami Mizuno will launch a new manga titled Hiiragi-senpai to Ofutari-sama (Together With Upperclassman Hiiragi) in the magazine’s January 2022 issue, which will ship on December 13.
The manga centers on Moemi, who, because of a certain incident, ends up living with her upperclassman Hiiragi.