The not-so-bright high school veteran Hino Aimi woke up just to find out (too late) she's a lilim, a vampire from the lust clan who feed on the blood and fluids of the sinful. Now, taken by starvation, she must hunt. Her prey: the quiet girl from class.

In a RPG world, a pretense villainess and her underling travel to a lost castle to retrieve an ancient and cursed item that will grant them the power of darkness.

An otaku's little sister forces him to bring her to a shoujo anime convention with ulterior intentions. A parody of sibling Japanese genre, where the brother/sister companionship and love comes along hierarchy, rivalry, and a bit of bullying.