She was initially part of a mixed-gender project group with Son Ho-young and Danny Ahn of g.o.d and Kim Hwan-sung of NRG, but she decided to join SM Entertainment after successfully auditioning for the company.

The group officially parted ways in 2002, due to the expiry of their contracts with SM Entertainment.

[5] In January 2010, Shoo returned to the music scene with the release of her first mini-album, Devote One's Love with the lead track "Only You".

[6] In March 2014, Shoo signed with RUN Entertainment and returned to her career as an actress.

[7] In December 2014, Shoo along with her bandmate Bada made a special comeback on Infinite Challenge, in the episode "Saturday for Singers", and performed two songs ("I'm Your Girl" and "I Love You") with Girls' Generation member Seohyun, who was filling in for Eugene due to her pregnancy, but they stated that she wished they could have performed together.

members Bada and Eugene attended a charity event, Green Heart Bazaar.

[9] They started their project of the 20th anniversary debut with released digital single "Love[Story]", a remake of their 1999 single "Love", through SM Entertainment's digital project SM Station on 28 November[10] and its music video released on 29 December.

[11] In early December 2016, they aired their ten episode reality show Remember, I'm Your S.E.S., which broadcast through mobile app Oksusu.

To accompany their 20th anniversary debut, they held a concert, Remember, the Day, on 30 and 31 December at Sejong University's Daeyang Hall in Seoul.

[15] Shoo married basketball player, Im Hyo-sung on 11 April 2010, at the Seoul Renaissance Hotel.