GEN Vol #12
- Publisher: GEN Manga Entertainment
- Written By: Kabaya Kosuke, love, Isora Azumi Nukuharu, Hajime Taguchi, Ryo Hanada
- Art By: Kabaya Kosuke, love, Isora Azumi Nukuharu, Hajime Taguchi, Ryo Hanada
- Language: English
- Digital Release Date: July 23rd, 2012
One is Enough, featured in GEN 11, is a Boy's Love story. Matsumoto-kun is just about to turn sixteen when he accidentally bumps into and injures his mysterious high school senpai, Mizushima-kun. Now, he is bound to make it up to him, but the lines aren't clear on just how far this new angst filled steamy relationship will go.