Peninsula: My mentor Kim Tae-yeon

Is Kim Tae-yeon past her prime? Yet her students are practically "blowing up" K-pop. Suddenly, a woman only he can see appears beside Su Xia, constantly nagging him to sing and dance. Wait, what's the point of learning this stuff? What? Being an entertainer can be incredibly lucrative?! Respected teacher, please accept my bow! Six months later. When Su Xia's cover of a girl group song and dance became so popular that he was invited to the MAMA awards ceremony, he discovered… "Wait, where's my teacher???" PS: In terms of importance, Tae-yeon is the female lead, but not a supporting character. The supporting character is someone else, around the same age as Su Xia.