In May 1999 they released a second album, Eros, using guitarist Park Woong and bassist Kim Gun as session musicians, who joined the band officially a year later.

The band reached the peak of their popularity in April 2001 with their fourth album, Swear, which featured romantic ballads as well as the more typical rock songs.

In October 2003, the band reformed as a full lineup, with guitarists Jung Yuhwa and Ha Sebin, Kim Seungjoo on bass and Choi Minchang on keyboard joining Seheon.

Soon afterwards Seheon again became the only official member of the band, with Seungjoo and Yuhwa from the Planet Eve era occasionally supporting him during live performances.

11 March 2017 saw Eve make their debut appearance on the KBS program Immortal Songs: Singing the Legend, performing their rendition of 도시의 거리 (City Streets) for the Kim Myung-gon special.