The June issue of LaLa revealed that the Marriage Purple manga will end with the next two chapters.
Furthermore. It is worth remembering that the 5th volume of the manga had already revealed that the work would end in the upcoming 6th volume.
Synopsis
The manga centers on the character Rin, who enters the high school of his dreams and has an unexpected encounter with his elementary school classmate, Yukichi. They never got along, and Yukichi seemed to enjoy picking fights with Rin back then. When they meet again, Rin absentmindedly signs a piece of paper with her name, only for it to be a marriage contract with Yukichi. She promises not to subject him on the condition that Rin “never leaves her side” for the next three years.
Marriage Purple was therefore launched in Hakusensha 's LaLa in July 2018.
Source: ANN