If you understand Japanese and are looking for some 2D romance, Marvelous has the bundle just for you.
The company just launched a compilation of all Senran Kagura Shinobi Refle content on the eShop for 4,000 yen. This is around 810 yen cheaper than buying each character pack separately.
So far, a similar bundle has not been announced for Senran Kagura Reflexions – which is the western localization of the romance simulation game. We will post updates if we hear more.