BE:FIRST Shares Live Performance Video of SB19 Collaboration ‘TOYFRIEND’ from D.U.N.K. Showcase 2026

The post by @BEFIRSTofficial announces and links the YouTube video of the joint SB19 x BE:FIRST performance of their collab track “TOYFRIEND” at the D.U.N.K. Showcase 2026 (held at K-Arena Yokohama). It includes hashtags tying the two groups and tags @SB19Official. It is trending due to strong fan engagement from both Japanese BESTY (BE:FIRST fans) and Filipino A’TIN (SB19 fans), high initial likes/reposts (~2.3k likes, ~780 reposts shortly after posting), and coordinated posts from the groups’ official accounts and the event organizer releasing the same footage.