The series follows Nozomu Tokura as he tries to get more sales to the cafe he recently opened with the new helpers he met.

Rainy Cocoa Goes to Hawaii!! Nozomu Tokura, who is Aoi's older brother, is appointed as the manager of the Hawaii store. With more new characters, will he be able to open up the store there successfully?

Life at the Rainy Color café can never be described as boring. The arrival of the Koga brothers from England—Noel, always brimming with curiosity, and Nicola, somewhat shy and conservative—ensures that their sibling, café manager Shion, is kept on his toes. 

Due to various circumstances, college freshman Aoi Tokura begins part-timing at the café "Rainy Color" run by Shion Koga and owned by Kōji Amami. Attending the café are the cool and handsome Keiichi Iwase and the confident Ryōta Sakurai. Aoi's life gets a lot more hectic, but fun.