[I got swapped with a cool, handsome guy!?] Umi Okita is a good-natured office lady working at an IT company. One day, she ends up taking on a colleague's work on a typhoon day. When she somehow manages to finish her work and heads home, she sees a man walking his dog in the heavy rain. It's Taishi Irie, who belongs to the same company. When she is surprised by the unexpected hobby of this silent and unsociable man, his dog jumps on her...!?