JT&MARCUS

On October 30, 2020, MLD revealed that former TREI members Kim Jun Tae and Lee Jae Jun had signed an exclusive contract with them and will soon start activities as a duo called JT&MARCUS. On October 14, 2021, JT&MARCUS made their debut with the digital single "Dear You". On December 23, 2021, the duo released their second digital single "First".

On March 5, 2023, the duo released their third digital single "Sentimotion". On November 10, 2024, Jaejun announced during an Instagram live that the duo has left MLD Entertainment following the end of their contracts. Since both members are now members of the boygroup IN A MINUTE, it is likely that the duo has silently disbanded.