Could this possibly be the early band of Rui from MIRAGE? His real name is Takashi, same as one of the guitarists here. A comment on his vkdb page claims he was in a band called LUCIFER. https://www.vkdb.jp/%EC%C9%CA%FD%B9%A7%BB%CA.html The only thing that might clash with this theory is the omnibus they appeared on in January 1998 if that date is even correct because there's actually "1997" printed on that omnibus. There's also the possibility that they were already disbanded at that point despite being on the omnibus.

@Keiyuu Good idea! I always thought the Lucifer thing was some mistake, but his name being Takashi would make sense. I'll add it for now, with a question mark.

@Keiyuu Ah, wait. Just checked my copy of Forbidden Pleasure, and the members for that CD were: V. Ryu, G. Wackey, B. Ayumi, and D. Maa. Seems to be completely different from the lineup listed here (not sure where this lineup came from?). Do you own those demotapes? Do they list the members?