Ok, just wanted to post a correction about that 凛 -the end of corruption world- (LIN) lucky bag CD.
I've seen some better pictures of the CD, and the title is definitely PERFECT LOVE ~Tribute by LIN~.
From seeing better pictures of the CD, we now know two other things. First, the song is definitely a specially arranged cover version of 50TA's “hit song,” PERFECT LOVE. You can sort of hear the terrible joke song here.
Second, we know that they definitely do romanize their name as LIN. So that's that.