Izuna 2. The box features artwork of scantily-clad Izuna and Shino relaxing at an onsen, and is designed to mirror the appearance of PC eroge (hentai games.) No, Izuna 2 isn't a hentai game. But it does star female characters with whom plenty of otaku are no doubt obsessed.
Publisher Success is partly making fun of eroge, we think, and simultaneously serving and mocking any prurient interest in their characters. Can you imagine an American game made to look like pornography for the purpose of sales? But it's different in Akihabara, where apparently you wouldn't want to be caught dead buying just a DS game and no porn.