That Time I Got Reincarnated as a Slime, Vol. 5 (manga)

Framea's hard at work on the next part of her Tempest Guidebook, but the costs of conducting research are continuing to compound! Luckily, Rimuru has just what she needs-a convenient card that can be used in place of cash. But Framea soon finds that resisting the many temptations of Tempest is a tough task...and with a little encouragement from two troublemakers, she sets off on a spending spree that may just bankrupt her bewildered boss!