Koron Nemuta is a girl who yawns when embrassed. One day, she found a vase when she was lost. When she yawns, the genie Akubi will come out of it, but, when she yawns again, Akubi will come back into the vase. (Source: ANN)

In the midst of a violent invasion of Earth by unknown alien forces, photojournalist Wakatsuki Tetsuya comes across a scantily-clad alien woman, cutting a swath of death through the Terran ranks with her sword. After a chaotic struggle, Tetsuya is knocked unconscious, only to awaken aboard her starship. To his surprise, she turns out to be Kahm, the invaders' princess - and she has picked Tetsuya for a starring role in her upcoming wedding. As the groom...

Tomoya Mikami's life changed one day when his girlfriend Ayaka was hit by a car and killed on her way to meet Tomoya. He blamed himself for her death and never was the same after the accident. He began acting callously towards Yue and his other friends. Furthermore, every time Tomoya gets involved with a new girl, he sees images of Ayaka in his dreams. He decides he needs to find a way to say goodbye to his lost love once and for all, while dealing with several side romances at the same time.