Introduction

I want to protect my little sister (family).

Make them obedient to become stronger! An ecstasy battle action that goes beyond the critical point! Based on a light novel written by Tetsuto Uesu and illustrated by Nekosuke Okuma (Nitroplus), the series started publication in 2012 under the Kadokawa Sneaker Bunko label and has released 6 volumes to date. As the “ultimate desire-action that surpasses the limits of the light novel” filled with stylish and classic action, extremist ecstasy portrayals within the series became the talk of the town, and the novel has been comicalized in magazines “Monthly Shonen Ace (art by Kashiwa Miyako, published by KADOKAWA's Kadokawa Shoten) and “Young Animal Arashi” (art by Fumihiro Kiso, published by Hakusensha). Currently, the total circulation of novels and comics put together is over 800,000. The trending power sees no end, and surpassing the realm of light novels and comics, it will finally turn into a TV anime series come January 2015!

Story

“Hey – you said you wanted a little sister, right?” Basara Tojo panicked to the sudden query from his father. However, his unparalleled father declares getting remarried, and after bringing over two beautiful girls that were to be his stepsisters, he was gone in the wink of an eye to go work overseas. However, the true identities of the two girls Mio and Maria were the daughter and succubus for the previous devil lord!? Basara narrowly escapes from being forced to a contract as servant, but mistakenly creates a contract in reverse – where Basara becomes the master. On top of it, one sexual situation after another befalls Basara thanks to the contract. Meanwhile, Mio is in danger as other devils and the hero clan are after her life–!? An ecstasy battle action of the most powerful contract servant!

Characters

	Basara Tojo VA:Yuichi Nakamura A male student that lives with his father. Panicking due to the sudden arrival of two younger stepsisters. His true identity is a previous member of the hero clan, and swears to use his own powers to protect the girls. “An older brother is one that protects his little sisters, even if he puts the world against him!”
	Mio Naruse VA:Ayaka Asai A stubborn, large-chested beautiful girl who became Basara's younger stepsister. Actually the daughter of the previous demon lord, and has inherited his powers. “Please, just stay put like this. If you move, I'll kill you a hundred times over.”
	Maria Naruse VA:Kaori Fukuhara Basara's younger stepsister. Her true form is a succubus, and contrary to her young Lolita appearance, often sets up sexual situations for Basara and Mio. “Is there any other way to use a younger stepsister than to train them to your liking?” .
	Yuki Nonaka VA:Bridcutt Sarah Emi Childhood friend of Basara. Had an emotional reunion with Basara when he transferred into her school, but–. “I thought you were mad, Basara. Because I glomped you, but you didn't look so happy.”
	Jin Tojo VA:Keiji Fujiwara Basara's father and a masterful photographer that travels all over the world. However, his true identity is…? “Little sisters are great. They're cute, they're kind, they're soft. And they wake you up in the morning, too.”
	Chisato Hasegawa VA:Yuu Asakawa The all-too-beautiful school nurse of Hijirigasaka Academy, the school where Basara and the others attend. “The problem is not the numbers… it is the quality of your cohorts.”

Gallery