Tokiro Ehara, an idealistic geeky professor, begins teaching at an exclusive high school for girls, with hopes of meeting young innocent minds in their most fragile state. Unfortunately, on his way to work, he meets 18-year-old Miyako and finds out that she is one wild student that needs to be taught how a prim and proper teenager should behave. He starts to believe that he is just the right person to teach her. Miyako, however, has other plans, and she's not above using her seductive wiles to lure him into submission.

Kawai Haruto belongs to a cinema club to realize his dream to make his own movie. But he is losing his passion of the movie because Hina Yusuke, his best friend as well as a good rival, died suddenly last year. One day, he meets Sendo Mahiro. She asks him to make a movie with her. Also she says that she was at the place where Yusuke died, and that he died because of her. On the other hand, Yusuke’s little sister Hina Asuka blames him for killing her brother.

Twenty-four-year-old Kirara is on her way to her wedding when she is killed in a car accident. However her love for her fiance is so strong that she is permitted to return to earth as a ghost to see him. But she is sent back 8 years in time, to when she and her fiancé first met. However her own meddling in the past may make her 16 year-old-self turn away from her would-be fiance.

Just when everything seems peaceful again for Yuna and her friends, a new enemy appears in the form of three robotic sisters. Yuna must once again become the Savior of Light to fight this strong, new evil.