Tomoya's father has just remarried to a new female. Which, like all good anime, means that Tomoya gets a new sister. Much to Ichika's shock Tomoya is super cute and she instantly develops a cute little brother complex for her newly found little brother. Which subsequently makes her younger brother's life miserable. Watch the show unfold in the same way over and over again as this guy is sad that he has a hot girl fawning all over him.