On September 14 and 15, Yang Yo Seob made a duet Jo Sumi at the La Fantasia Park Concert with Jo Sumi at Olympic Park.
Yo Seob greeted the audience with a black tuxedo. Jo Sumi introduced the B2ST member using the poem stating "Because the heart is beautiful, the world is beautiful," showing fondness to him.
Holding hands together, Jo Sumi and Yang Yo Seob performed the duet song, "Person, Love," with a flawless harmony, singing about the undying love, the audience seemed to love it. After filling the audience with abundant effect, Jo Sumi gave Yo Seob a big hug following the performance.
The reason that Yo Seob was with Jo Sumi was because she saw the video of Yo seob singing the song "Mother." And so, Yo seob, on that night sang that song, by himself.
After his performance was over but he was unable to get rid of the irresistible feeling of the moving stage,Yo Seob took to his social networking site to say his thanks.
Yo Seob said his gratitude to his partner and teacher, Jo Sumi, and to the orchestra who played for him. He also thanked all the people who came.
Yo Seob has an upcoming musical drama.