17-sai.

 is a manga with the story by and art by , published in 2004–2005. It depicts the kidnapping and rape of a girl, based on the murder of Junko Furuta. It was published in Japan by Futabasha and serialized in "Manga Action".
It was published in Spanish in Spain by Ediciones Mangaline as "17 Años" ("17 Years"), and in Taiwan by Tong Li Publishing.
Plot.
A group of gang members led by Miyamoto capture Sachiko Ozawa, a high school student, in Chiba Prefecture, and after assaulting her at a hotel, confine her at a house in E-Ward, eastern Tokyo, where they commit acts of rape and torture. Her sister Miki frantically attempts to find her and takes the initiative, distributing flyers. Hiroki Marukawa, the main character and a schoolmate of Miki, is so intimidated by the other characters that he outs Sachiko when she attempts to hide, and she fails to disclose his information to Miki, despite being prompted by Miki. Despite the hazards to her life, Miki is led to the house by gangsters, and, along with Sachiko, is rescued by police following on a tip before the gangsters attempt to kill her. Hiroki, unlike his fellow co-conspirators, is tried as a juvenile and adjudicated delinquent, being incarcerated at a reformatory, instead of being tried as an adult and going to a prison for adults. Hiroki becomes the leader of his dormitory at the reformatory. As fellow gang member Takashi Ikuno is the only murdered victim, ringleader Miyamoto avoids the death penalty. Miki does not forgive Hiroki despite his pleas, as he failed to rescue Sachiko at opportune times. Sachiko ultimately survives her torture and injuries.