Lamy Rose

Kyotaro Tsugumo, a university professor and medical doctor, is the director of the Sexuality Research Institute. One day, a female college student, Eiko Tsugawa, visits Tsugumo to sell her "sex equation" that she has invented. A few days later, Eiko and her friends, Yuki and Midori, are asked by the editor-in-chief of a recently banned weekly magazine to investigate the actual situation of soaplands

Kiyomi, a popular hostess at a bar in Shinjuku, has a traumatic childhood that makes her only sensitive to sexual intercourse with women. One day, the girl she loved as a junior hostess betrayed her and slept with her man. Uncomfortable with men, Kiyomi "swaps places" during sex with her new girlfriend, a trans woman Kaoru.