Boys Love, the first film released in 2006, tells the story of Taishin Mamiya, a magazine editor who meets and interviews a young model, Noeru Kisaragi, and becomes attracted to him. Their love, however, is forbidden. The tagline of the movie is "All we did was love each other, but...our love is forbidden.
All we did was love each other, but...our love is forbidden. Why is it a 'sin'?