https://psnprofiles.com/trophies/11244-kawaii-deathu-desu/ArcticCress
https://www.truetrophies.com/game/Kawaii-Deathu-Desu/trophies?gamerid=5963
This beat-em-up has monster and undead idols beating up on their crazed fans to gather souls. At least, that's what happens when you play it; there's no story or anything to tell me if I'm correct or not. The game itself is very short, you can probably unlock and clear all of the stages just by using all your souls to level up the character you start with, and finish in about two or three hours. However, the platinum requires 11,000 kills from each of the first six characters (the other three characters were a later addition, and have no trophies attached), as well as getting all of them to level 9 (which will take longer than getting the required 66,000 kills needed). There is a method using the cloud save to get the trophies faster but it only saves a few hours in total, so I didn't bother and just played it normally. In the end, it took about twelve hours and a lot of hammering the L1 and R1 buttons; a good time waster between other games.
http://backloggery.com/articuno2001/sig.gif