One of the best K-Drama original soundtrack (OST) releases of June 2015 was "Love Song," performed by BtoB's Yook for "Who Are You: School 2015." Yook starred in the teen series as Gong Tae Kwang, the son of a famous actress and the director of Sekang High School. In the end, Tae Kwang did not win the heart of Lee Eun Bi (Kim So Hyun), the girl he continuously struggled to defend. "Love Song" reflects the conflicted feelings possessed by Tae Kwang, as he realized that Eun Bi was more interested in Han Yi An (Nam Joo Hyuk).

Block B's Zico joined forces with Girl's Day Sojin for the passionate hip-hop song, "Sick," from part two of the "Mask" original soundtrack. The emotionality of the song highlights the bizarre relationship dynamics within the melodrama. The SBS series continues to record strong ratings but has fallen from double-digits.

Zico is currently appearing as a judge on "Show Me the Money 4," the fourth installment in the popular hip-hop competition. Audiences have tuned in to see how the Block B rapper will judge the contestants, particularly WINNER's Mino (Song Minho), who also received his start within the underground hip-hop scene.

Jung Yup performed the stirring song "Dazzling Day" for the "High Society" soundtrack. The SBS Monday-Tuesday series has attracted the attention of viewers, who have tuned in to see the relationship dynamics of Jang Yoon Ha (Uee), Choi Joon Ki (Sung Joon) and Yoo Chang Soo (Park Hyung Sik).

BEAST's Yang Yoseob kicked off the releases in June with "Why Don't You Know" for "Let's Eat 2."

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About the writer: Adrienne Stanley is a contributing editor for KDramastars. She is also a contributing writer for Kpopstarz, MTV Iggy and CJ Entertainment's KCON blog. Her passions include a love of K-pop and Asian drama. When she is not writing, she is hanging out on Twitter (@retrogirladdy).