Nana & Kaoru - Black Label #1

Plot

During their final summer vacation, Nana and Kaoru’s plans coincide when both find themselves staying at the same mansion in the countryside, with Nana being tutored by adult goods shop owner, Tachibana, and Kaoru by his favorite BDSM writer, Sarashina Shutaro. Wanting to use the couple as inspiration for his next book, the two witness Shutaro's mastery of BDSM with Tachibana. So when Nana witnesses the rawness and intensity of true BDSM, will she look away or will something new unlock in her?