Hatsue Nishi

Twenty years after their planet was attacked by the brutal Zone Empire, the five Hoshikawa children, who escaped and were raised on Earth, must prepare for a brand-new war. This time, though, they're ready ... having developed the powerful Fiveman technology that will help them defend Earth from the same empire that conquered their home world.

Everyday salary man Shimano Yuji meets and beds a pretty young girl at his bachelor party. Meeting her again at his wedding, he realizes that he has just began an affair with his sister-in-law.