Aki Katsu launched a new manga titled 3 Partner Hajimemashita!! (We started 3 partnership!!) on Shogakukan’s “e Big Comic 4” website on December 7, 2018. The next chapter will be available on January 4, 2019.
The manga is about a love between three people, in particular a woman who marries two men. Katsu explained in a comment that his intent was to portray a different form of love than what appears in his Futari H manga. (“Futari” means “two people.”)