The company bought over the Industrial Bank of Korea's basketball team prior to the start of the newly-founded professional league.

[3] As a relatively new franchise sponsored by a smaller corporate company, the Nasan Flamans did not have star players of that era, nor did they have the financial resources to lure the biggest names like some of their counterparts.

The Nasan Group faced bankruptcy due to the 1997 Asian financial crisis, which had hit South Korea hard.

[7] It began investing in bigger names, including Yonsei University star and 1998 Asian Games silver medalist Cho Sang-hyun and rookie forward Hyun Joo-yup.

[8] The unfancied team made the play-offs, notably beating Seoul Samsung Thunders before losing to Daegu Tongyang Orions in the semifinals.

Under new head coach Choo Il-seung, the KTF Magic Wings reached the play-offs for three consecutive seasons.

[12][13] KT Sonicboom finished runner-up in the 2009–10 league table and qualified for an automatic spot in the play-off semi-final but lost to Jeonju KCC Egis.

[17] With the KBL's new "hometown" policy encouraging teams to have their home ground and training facilities located in the same vicinity, KT Sonicboom opted to relocate to Suwon.

[19] KT Sonicboom became the new tenant of the Chilbo Gymnasium, which was home to Busan BNK Sum for the 2018–19 season and hosted some U-League games.

[20][21] Although the 2021–22 season began poorly, with a loss against Wonju DB Promy, KT Sonicboom embarked on a nine-game winning streak in November and December.