I always thought it was this mediocre pop punk band? Formed at around the same time, same band name... Idunno, it is a pretty big leap in terms of sound and style though lol.

http://ukproject.com/ukp_artist/1181/

The members' names don't line up. "博史" is not, as far as I know, read Takeshi; and "賢" is not read Keita as far as I know. And yes, the style seems to have been different.

少なくともデモテープ2本があったけど情報はやっぱりない。誰か、分かりますか。

There should have been at least two demos, but there is no information at all. Does anyone know about them?