Carefinder is a bilingual babysitter matching site that connects families in Tokyo and throughout Japan with qualified babysitters. As CareFinder moved out of beta into full release it required the implementation of a membership system that allowed for parents to pay a monthly fee online to get access to its premium features.

Rain implement the membership and e-commerce system which allowed new and existing parents to select their subscription plan of choice. This membership system automatically charges parents regularly through its e-commerce system while providing access to the premium features.