Lime-iro Senkitan: Nankoku Yume Roman
Genres: Action, Comedy, Ecchi
Type: OVA, Episodes: 2
Aired: Apr 23, 2004 to Jun 25, 2004
Studio: Studio Hibari
Source: Visual novel
Rating: R - 17+ (violence & profanity)
Synopsis:
With the battleship Amanohara seriously damaged and in need of repair, it lands on an island where a Gogyou festival has just begun. Shintaro Umakai and his five female students, known as Raimu Unit, enjoy a period of peace on the island. However, the enemy still pursues them. Umakai and his unit deal with the enemy while the five girls try to draw his attention.

(Source: ANN)