Released in 2012, Burunyanman Portable originally started life as an eroge STG for the PC known as Burunyanman Hardcore! The game was later toned down (aka all the questionable, and I really do stress the word questionable, material was removed) and released for the Sony PSP handheld in both regular and limited editions. The game also appeared as a cheaper ‘best’ edition further down the line.
This is a flyer for the launch in 2012. I picked this up in one of the Trader stores in Akihabara. Burunyanman Portable is actually a great little STG, just like it was on the PC where it made it’s debut. Thankfully removing all seriously dubious adult material did not ruin enjoyment of the actual game. I would advise against importing the PC version of the game, lest you may have your collar felt!