No further details about the production of the 3rd season are currently available.
The official web site of the short-form TV anime adaptation of Rainy Cocoa, which is based on the bilingual digital manga of the same name, has announced that a 3rd season of the series has been greenlit.
Aoi’s soaked by a sudden rainstorm and takes shelter at Rainy Color, a cozy café where the warmth of the staff compliments the sweet hot cocoa he’s served.