This sequel to the Silent Mobius The Movie 1 continues the timeline of the flashback section of the first movie (Katsumis initial contact with AMP), using some more ideas and persons from the Manga, and being slightly less incompatible to the Silent Mobius series from 1998.

In a futuristic Tokyo, several policewomen fight a monster. One of them, Katsumi Liqueur, remembers where she saw it before... Katsumi Liqueur, an American-born woman of Japanese descent, travels to Tokyo to visit her mother, Fuyuka, who is sick in the hospital. She takes a shortcut through an alley after her taxi gets stuck in traffic, only to encounter a monster and two policewomen fighting it. Later, she meets their chief, Rally Cheyenne, who, it seems, has been expecting her, though Katsumi has never met her before. The policewomen want Katsumi to help them fight the monster, but Katsumi, who does not want to believe in magic, resists.

The adorable and attractive main characters of Haru wo Daiteita are Kyousuke Iwaki and Youji Katou who are both in the film industry, having starred in various adult video films and are trying to climb the ladder of success and become greater actors. Iwaki is accepted to star in a popular movie, having beaten Katou in the auditions. During their time together, Katou believes he is in love with Iwaki-San, who on the contrary refuses to believe that he is in love. It is later on that another gay actor comes back to Japan and co-stars with Katou that problems starting arising. And it is from then on that the two realise where their hearts are set.

Based on the childrens' book Little Polar Bear by Dutch author Hans de Beer.