The reason they chose it was derived from their hope – the one of putting in it the most precious things of the world.

The duo first had a debut concert through an online independent internet broadcasting station m2tv.

It received rave reviews, and won and maintained popularity for a long period.

Its title song was '331', which was much loved and proved Yurisangja's popularity, though it had religious tints.

The 3rd album, Be Happy,[3] released in 1999 ranked high in almost all charts, and became a frequently used wedding song.