Moe confesses to Yuuka who rejects her harshly in a haughty manner different from her usual "good girl" personality... but Moe seemed to enjoy it?

On a rainy day, when Mai got stood up by the guy she likes, she met a beautiful girl who told her that she was the Rain and that she had come because of her tears. After that Mai's days were filled with the bitterness of betrayal, only the memory of the girl called Rain can somehow ease her heart. A story of a brief love affair under the rainy season.

Two sets of friends come together to form a tight-knit group. Things become interesting when Nao spots Aoi's feelings for Chihiro.