主人公雷昂巴特（以后略称为雷昂），是个在天才魔物使巴契手下学习成为魔物使的少年，虽然已经理解了基础，却还是不能令低级的魔物成为使魔。在这样的学习中的某一天，船长香草（魔物少女）出现，要求他帮助自己，把雷昂强行拉走了，通过传送门来到了一个不可思议的岛上。 这个岛屿叫做乌贼乐园，是拥有强大力量的乌贼男爵为自己制作的乐园之岛。乌贼男爵在这里聚集了从世界各地挑选来的魔物少女，准备从中挑选一个做自己老婆。被监禁在这座岛上，被不喜欢的乌贼当作未婚妻百般挑选而感到屈辱的魔物少女们虽然很愤怒，却因为乌贼男爵和他的部下杀女（对魔物少女来说无敌一样的怪物）而无法抵抗。 所以，虽然借助人类的力量很不情愿，却只好决定请既绅士又有强大力量的魔物使巴契成为自己的领导者，共同打倒乌贼。然而，使用了每周只能打开一次的传送门而带来的，不是巴契，却是他的弟子，还在见习的雷昂。

マーティスとミラの二柱の恋愛神に守られた恵み多いトラム山麓の街、ショートラム。人々はこの街で平穏な日々を過ごしていた。 だがある日、女神ミラがトラム山に世界中からモンスターを転送し、男神マーティスは攻撃を仕掛けられ、なす術なく封印された。 この街を偶然訪れた修行僧セイルは、教会で壺に封印されたマーティスを見つけ、自由にしようとするが、完全に解くことはできなかった。そのため、ミラの本拠地トラム山に乗り込んでの「ウーギの封印」の解封を約束する。その時渡されたのが黄金の杖「ゴッドバイヴ」。この作用でモンスターを直接攻撃できないセイルは、ともに闘う有志を募り、14人の少女たちが集まる。

In the far east nation of Nippon, a plethora of feudal lords are fighting for supremacy in the 4th Sengoku Era. After doing immeasurable damage on the Continent, the brute known as Rance traveled with his slave, Sill, to the island country. For a hot spring vacation, you ask? Wrong. While they'll go to some hot springs, Rance's goal is to bang all of Nippon's beautiful princesses, samurai, miko, ninjas, village girls, and more. In particular, he wants Kouhime of the prominent Oda Clan. When Rance becomes the ruler of one of the feudal states, he charges head first toward uniting Nippon! [From [url=http://mangagamer.org/rance/7/index.html] MangaGamer[/url]]

This game is not considered part of the official Rance universe timeline, forking off after the events of Rance 4.2, as a "What if" episode. However, many characters and ideas featured in later Rance games originated in Kichikuou Rance. The game begins at the start of LP0003. The warrior Rance, accompanied as always by his faithful slave Sill Plain, has been living as the leader of a group of bandits in northern Helman after killing their previous leader as part of a job given to him by the Keith Guild. While Rance greatly enjoys the raping and pillaging that comes with being a bandit leader, the guilt-ridden Sill believes that he is in danger of losing what remains of his conscience and genuinely becoming a villain. After attacking the city of Golak, Rance's group alerts the attention of Ruberan Tser, commander of the Helman volunteer army, who launches a counterstrike on them during their second attempt at pillaging the city. Unable to fight against a genuine army, the bandits are quickly destroyed, Sill is captured by the Helman Army and Rance is forced to flee for his life. Rance evades the Helman army for several days, with both his equipment and health steadily declining all the while, before he finally passes out from fatigue along the Leazas/Helman border. He is found on the verge of death by Kentou Kanami, the personal ninja of Leazas' queen and Rance's longtime admirer Lia Parapara Leazas, who brings him to Leazas castle. After three days of recovery, Rance finally regains consciousness and, completely humiliated by his defeat at Helman's hands and desperate to rescue Sill, demands that Lia give him the Leazas Army to destroy the enemy nation. Finally seeing an opportunity to have Rance to herself, Lia agrees on the condition that he first marry her, which Rance reluctantly accepts. As the new king of Leazas, Rance sets his first steps on a path that will lead to either world domination or death. [Taken from the [url=https://web.archive.org/web/20230118041246/https://alicesoft.fandom.com/wiki/Kichikuou_Rance]AliceSoft Wikia[/url]]

大陸に現存する国家の中で最も古い歴史を持つ軍事大国、ヘルマン帝国。 歴史の中で長く世界最大最強の国家であったこの国は、 数年前から続く腐敗政治によってぼろぼろに荒廃し、疲弊している。 いずれ内乱が起きるか、隣国に攻め込まれるか、その両方か―― 少なくない人々がそんな終焉を予見する中、 かつて国を追われた男が立ち上がった。 数年前に功を焦って隣国へ侵攻し、失敗して行方をくらませた皇子、 パットン・ミスナルジ。 いつか国を取り戻すと誓った彼は修行を積み、たくましく成長して帰ってきた。 「修行の旅で知り合った一騎当千の猛者を集め、少数精鋭で革命を成し遂げる」 その作戦の仕上げにパットンが協力を頼んだのは、 最強の鬼畜戦士ランスだった。