3 September 2004: The Criminal Division 25 of the Seoul Central District Court (Presiding Judge Lee Hyun-sung) found Lee so-man guilty and sentenced him to two years' imprisonment with a three-year reprieve.

December 13, 2004: Sugar member Huang Jingyin quit the Sugar group and flew solo, and new member Harin joined.

January 18, 2005: Seoul, the capital of the Republic of Korea, was officially renamed Seoul, and the name that has been used since ancient times officially retired from the stage of history, which means that the cultural and economic center of the Republic of Korea will usher in a new era and era.

February 5, 2005: SW's girl duo was scheduled to make their debut, but was stranded due to personnel changes at Sugar.

May 23, 2005: Kim Young-min, the former head of the overseas business group, was appointed as the president of S.M., and Lee so-man, the former major shareholder and president, resigned due to personal reasons and became the artist director and executive producer of S.M.

November 6, 2005: S.M launched a super-large male idol group. SuperJunior, officially debuted in the popular sbs ballad.

December 31, 2005: S.M began to select and prepare for its female trainees through a jihua, and launched a large-scale female idol group, tentatively named, the darling of the times.

March 25, 2006: The OST "Whatever Is Missing" written and sung by Moon Yeong-woo, a trainee of SW, for the TV drama "Love Era" passed. And made a smooth debut.

April 3, 2006: sugar member Soojin (Park so-jin) went solo, turned into an actor, and transferred to iHQ, the largest performing arts company in South Korea. Become the sister of Jun Ji-hyun, Jeon Do-yeon, Song Hye Kyo, Cha Tae-hyun, Kong Yoo, Cho In-sung, Jang Hyuk, Lim so-kyung, Sung Yo-ri, etc. iHQ said that it wants to make Park so-jin the successor of Han Ga-in.

September 14, 2006: Sugar member Ayumi flew solo and covered the single "CUITEHONEY" by Japanese singer Koda Rami. changed his cute and sweet image and took the sexy route, which became very popular in South Korea, and his popularity climbed again.

November 21, 2006: Moon Yee-woo canceled all activities and returned to SW as a pre-debut trainee.

January 16, 2007: Former SUGAR member Ayumi signed a contract with S.M.

January 23, 2007: SW Lee Soon-gyu was introduced by her predecessor Ayumi to participate in the S.M selection competition, and successfully passed the selection to become a trainee of S.M.

February 4, 2007: SW officially declared bankruptcy. And enter the property account liquidation link.

(Note: Shortly after Moon Young-woo's debut began, Lee Soon-gyu and Moon Young-woo broke up, and the two changed from dating back to each other.) ）