5

5' has five main plot lines for the player to experience, each following one of the five heroines. To view all five plot lines, the player will have to replay the game multiple times and make different decisions. Different endings allow the player to see different h-scenes involving the protagonist, Takahiro, and one of the five heroines.

The story of 5 revolves around Takahiro Inaba (稲葉 孝弘, Inaba Takahiro), who makes a trip to Hokkaidō, Japan with his younger sister Airi Inaba (稲葉 愛理, Inaba Airi; Voiced by: Mayumi Shindō) in the winter. The two find their way to Kaede Okina (奥菜 楓, Okina Kaede; Voiced by: Reona Sakura), a friend of their father's, only to realize that their visit is not expected as their father only contacted her regarding their visit that morning of their arrival. Despite this, Kaede welcomes them to stay at her farm, where the main portion of the game's story takes place, and provides them with food and shelter. After two days at the farm, Takahiro rides Kaede's motorcycle to the town's shopping district and comes upon a lively, but clumsy girl named Honoka Orito (織戸 ほのか, Orito Honoka; Voiced by: Chihiro Kanzaki), who collided with Takahiro and injured her leg after running downhill.

Due to this, Takahiro decides to take her home where he meets her older sister Nene Orito (織戸 禰音, Orito Nene; Voiced by: Himiko Moto). Nene, unlike Honoka, is more reliable, intelligent, and takes care of the general domestic household chores.

Originally titled Calling (コーリング, Kōringu), 5 is the third and last project developed by the visual novel studio Ram, and took about eight years to develop. Much of the staff for 5 did not work on Ram's previous two titles Negai and Koigokoro. , which was the artist's first work on a visual novel. Background art is headed by Torino.

For work on the scenario, the author Kai returns as the only scenario writer for 5 that also worked on Ram's previous two titles. Hiroshi Yamaji and Kanrinin also worked on the scenario, despite the two having not been on the staff for many visual novels. The music in the game was composed primarily by Jun Maeda of Key, and VWN who also worked on the music for Negai and Koigokoro. Maeda stated that he composed about twenty background music tracks used in the game, and this was the first time he worked as the main composer on a game project.

Based on the sales on Getchu.com, 5 made its only appearance on its sales ranking at the nineteenth place out of thirty when it was first released in July 2008. According to a national ranking of bishōjo games based on sales in Japan, the limited edition of 5 premiered at eighteenth place out of fifty.