Therapist Bang Yongguk has his hands full as he delves into the therapeutic process of helping Zelo, a selective mute, finding the root causes of his emotional and behavioral problems. He thought having his dream job was this biggest reward in his life thus far, but getting the teen to open up to him proves to be just as rewarding as it is challenging.

Bang Yongguk - Leader of B.A.P with his cool aura and penetrating look; though his heart of ice seems unbreakable, the slightest touch and glance of a 16 year old boy leaves the mighty leader at his knees. Zelo - Maknae of B.A.P with his overwhelming charisma and unique taste of style; he makes all the noonas wait in line. Though on the outside, it may seem he is a tough cookie, but deep inside, he hides a dark secret

  Zelo has a crush on the leader for a long time. But, when he kisses him, Yong Guk doesn't return his feelings. Will their relationship be forever changed? Zelo certainly hopes not, and with the help of Jongup's advice, he swears he'd do anything to get things back to the way they were. Even if that means pretending to be happy.