In a small corner of the city, the "Rainbow Convenience Store" opens. With a super-S manager and a pitiful clerk, a late night haunted quilt(?), a mangaka stocking up on food before a deadline, the "Strange Portrait Etching Customer" who insist on printing portraits on clean glass, the story tells of a 24-hour convenience store where unexpected wonders can occur at any time.

In 2011, Rainbow Smile won the Golden Comic Awards.