《后街女孩》的故事描绘了三个黑社会组织的流氓，山本健太郎、里原龙树和杉原和也。由于他们的错误，该组织的领导人命令他们转变为女性偶像歌手，为老板赚钱。三人本来想拒绝，但接受了这个条件，因为他们不想死。但是没想到他们成为偶像歌手之后，真的是火了，拥有了很多粉丝！但他们心中仍然有钢铁侠，每天都很痛苦。
Peter (played by Sean DeGuzman) is a photographer for weddings and events. However, in his spare time (many recently), he strolled in a picturesque remote lakeside camping area where couples came to camp outdoors. Peter will track these couples and secretly take videos of them having sex while getting off the car. Then, he will publish these sex videos on an online pornographic website to make money from them. One day, Peter followed a young woman named Mia (played by Kara Gonzalez) and filmed her while she was taking a shower. Mia was not angry, but on the contrary, she was very friendly to him. However, she has a hot tempered and sinister looking boyfriend RJ (played by Joseph Elisard) around her, who doesn't like Peter being with his girlfriend. The next time Peter secretly filmed a video of Mia having sex with RJ, he witnessed Mia suddenly slashing RJ's neck.
