Sei Shoujo Sentai Lakers EX / Battle Team Lakers Ex

Hentai "Sei Shoujo Sentai Lakers EX" is based on a same-named visual novel from studio Apple Pie. 

In ancient times, the peaceful planet Blade Star was invaded by the evil Gadram Empire. Those who managed to escape along with a super-energetic substance, Laker crystals, fled to Earth. Nowadays, descendants of the inhabitants of planet Blade protect Earth from enemies. Today they are known as Laker Stars, Laker Kung Fu, Laker Judo, Laker Soul, and Laker Rabbit. Their leader, Knight Blade, commands the Laker base on a super-space-time battleship. With the help of Laker crystals, they transform and fight, protecting Earth from the invasion of the Gadram Empire by wearing Laker suits.