"Sisters are the ultimate relationship!" The worst in history!? But it's actually a pure girls' love comedy, the tumultuous Volume 2! Momose Yuna and Kappa Rinka―― After going through twists and turns, I, Hane Yotsuba, have become the 'officially recognized' girlfriend of these two classmates known as the 'Sanctuary.' Thanks to their support, I've managed to avoid failing (almost) and I'm eager to fully enjoy summer vacation... but I end up getting caught on dates with each of them by my younger sisters, Sakura and Aoi!? Unable to cover it up well, I get found out about my double dating by my sisters. Sakura and Aoi look at me with disdainful eyes... which is understandable, since I'm double dating. But I don't want to break up with either of my girlfriends. I also want to make up with my sisters. What can I do in this situation――? A tumultuous girls' love comedy about double dating, Volume 2!