HI-BOYZ

On April 21, 2025, it was reported that TXT members Soobin and Yeonjun would be making cameo in tvN's medical drama ' as former idol groupmates of Um Jae-Il (Um Jay)'s disbanded group, HI-BOYZ. On May 10, following the release of the episode featuring cameos from the two TXT members, the performance video for "When the Day Comes" was announced to be unveiled on May 12. Although only Soobin and Yeonjun made cameos, all five members of TXT were featured in the song.

On May 16, it was confirmed that HI-BOYZ would be appearing on Mnet's M Countdown on May 22.