Hikari, ever since she first met Kei, been a second to him and that's why she considers them as rivals. She tries to beat him in anything; school grades, events, martial arts etc. She is accepted into an elite class of her school, but still she is no compare to Kei, who is always few steps farther than she is. Obsessively, she tries to do everything better and makes her best to never be called 'Number 2'. With her and Kei learning also few other really interesting people that become their friends, and like this they passing through the year.
The main girl characters are the same; they are hard to convince and violent yet devoted and hard working. The same goes for the male character that are in secretly love with them. Both of the series are made based on popular manga.