Girl group SONAMOO's High.D's direct support for TRCNG's comeback caught the eye.  

SONAMOO's High.D posted two photos on her Instagram, along with a message saying, "Happy boys! Cheer up!! (fear girls) #trcng #MISSING." 

The photo is an image with a member of TRCNG in the waiting room of SBS MTV's "The Show" on Thursday when TRCNG's comeback stage was held. (TRCNG's second single album was released at 6 p.m. on Aug. 5.)

Fans responded by saying, "Thank you for coming to TRCNG's support," "I think I'm the youngest person to root for you guys," and "Please come back to  SONAMOO as soon as well."

SONAMOO's High.D is affiliated with TS Entertainment with TRCNG, which took a short time to make a surprise visit to TRCNG's waiting room. 

Meanwhile, SONAMOO's High.D is practicing hard to become the best vocal member due to appear on tvN's new entertainment show "V-1, which is the entertainment show for this year's Chuseok pilot program; it selects the best "vocal queen" among South Korean girl group members.