On March 24, Yoon Se-ah said, "Wearing pretty balloons and volunteering with Bogum." Happy faces. Today's balloon event was the best. The world is worth living," she wrote.

In the photo released together, Yoon Se-ah volunteered with singers Sean and Park Bo-gum. In particular, Park Bo-gum drew attention by boasting a warm atmosphere even when he was slightly covered. 

The three previously shared their recent situation in which they took the lead in volunteering, such as carrying briquettes. Again this time, they gathered together to convey their warmth in the still cold weather.

Meanwhile, Park Bo-gum recently signed an exclusive contract with The Black Label.