Chise is an ordinary schoolgirl: small, frail, and not particularly intelligent. Her greatest joy is her budding romance with her classmate and childhood friend, Shuuji. They both live in a small military town in Hokkaido, where high schoolers have few concerns other than who is dating whom and complaining about the steep climb up "Hell Hill" every day before school. One day, Shuuji and his friends make a trip to Sapporo to buy gifts for their girlfriends. A massive air raid on Sapporo that day kills thousands, including one of Shuuji's friends, and signals the beginning of a war. Fleeing from the carnage, Shuuji spots Chise, though now she has steel wings and a massive gun where her right arm should be. Against her will, she has been transformed into the ultimate cyborg weapon, capable of leveling entire cities. As the war rages closer and closer to their hometown, Chise and Shuuji's relationship is strained by her transformation, and they are left to wonder whether she is even still human. [Written by MAL Rewrite]

The story follows Kintaro, former leader of a widely feared and respected biker gang, who decides that its time to "straighten out" and become a "salaryman" since his wife died and he has to take care of his young son. (Source: AniDB)

After a long time, Wataru has decided to leave his family home and live on his own. The girls have also decided to split up and most of them are living separately as well. But none of them have forgotten about their brother and still stick together to meet him. (Source: AniDB)

Hashiba Sora has fallen from a 4th story window and has lost all of his memories. When Fujimori Sunao comes to his school as his new room mate, Fujimori tells Hashiba that he is called Ran. Fujimori and Hashiba both have a split personality which they developed in their youth. Their split personalities, Yoru and Ran, are deeply in love. Even though it creeps Fujimori and Hashiba out what their other selves do with each other at night, they also start to fall for each other. Because of their relationship, Hashiba Sora finds out a lot of shocking facts about their youth.