Dragons Rioting Graphic Novel Volume 05 (Mature)

"After being diagnosed with a disease that makes sexual arousal fatal, and undergoing ten years of self-control training, Rintaro's about to face his ultimate test - an all girls' school. Having somehow survived his first semester, Rintaro returns home to enjoy a peaceful summer break. Except Ayane and Rurina decide to tag along, just in time for the annoying opening of the summer festival! But somehow, two people with knowledge of Ayane's past show up!"