SM Entertainment has slowly been introducing the trainees that are slated to be a part of their new boy group. The trainee group has temporarily been named SMTR25. On April 5, 2025, the company released an introduction film for Hyunjun. SMTR25 Introduction film_HYUNJUN#HYUNJUN #SMTR25 https://t.co/AYoYPvLlT1 pic.twitter.com/ngS4sdq7oM — SMTR25 (@SMTR25_official) April 5, 2025 Hyunjun already gained…