Chaosrise is a danmaku (bullet hell shoot 'em up) videogame in which you take control of one of two female protagonists in their quest to unravel a mystery of unknown powers awakening uncontrollable lust among inhabitants of an extraordinary world in which the story takes place. Making their way through varying parts of their universe, spread throughout seven stages packed with action (and horny enemies), little by little, they too, succumb to the new conditions, blanking their minds - but filling their bodies with much more fun stuff...
School has just let out for summer vacation,
and due to work your parents are overseas.
As the older brother you now spend summer vacation living with your 5 little sisters, but
you are an older brother who thinks constantly about sexual things one after another.
On top of that your little sisters are acting oddly assertive,
and that excitement is leading into a difficult situation...!