With Rin and Kaede going to school so often, Primula is starting to miss Rin so one day she comes to school unanncounced, though eventually leaves with some coaxing by Rin. Later, it is decided that Primula needs some undergarments she is lacking and thus Rin and the rest of the girls go out to help Primula with this problem. During their outing, Rin buys Primula a new cat doll.
