Soukaku Kankei.
- Volume Not AvailableChapter 1-8
- Ch 8 May 15, 2019 Ch 7 Apr 4, 2019 Ch 6 Mar 18, 2019 Ch 5 Mar 18, 2019 Ch 4 May 25, 2017 Ch 3 Feb 21, 2017 Ch 2 Feb 5, 2017 Ch 1 Jan 4, 2017
Twin sisters Airi and Himari have always been very close, and worn identical hairstyles, clothing and accessories. But after they enter high school, Himari starts to drift away from her sister. When cornered by Airi, she explains that she has "a promise with senpai to fulfill," no matter what.