B.O.Y (비오브유; previously as Kim Kook Heon x Song Yu Vin) is a male duo under The Music Works Entertainment. They released the digital single "Blurry" on August 24, 2019 and officially debuted on January 7, 2020 with their first mini album Phase One : You.
Their current name is short for "B.Of You" which both means "Best Of You" and "Both Of You".
2019: Produce X 101, "Blurry", official name
In May 2019, they both participated in the survival show Produce X 101. Kook Heon was eliminated in episode 11 and finished in 21st place while Yu Vin was eliminated in the finale and finished in 15th place.
Following the program's conclusion, their agency confirmed on August 8 the two was preparing to debut as a unit. On August 19, The Music Works confirmed the release date for the song on 24th and that the duo would be holding a fanmeeting on the 31st.
On August 21, The Music Works announced the disbandment of MYTEEN.
On November 12, The Music Works announced that the duo will be officially known as B.O.Y. Their name was selected from the over 2,000 entries for their fan club contest. The duo will also hold a concert titled 'Dear, You' at the Sangmyung Art Center's Gyedang Hall in Seoul on December 24 and 25 and will include performances of songs from their upcoming debut mini album to be released in early 2020.
2020: Official debut
|Kim Kook Heon (김국헌)|
|Song Yu Vin (송유빈)|
- "Blurry" (as Kim Kook Heon X Song Yu Vin) (2019)
- Dear, You (2019)
- Soompi: B.O.Y (Kim Kook Heon And Song Yu Vin) Announces Fan Club Name Ahead Of Comeback
- Koreaboo: MYTEEN’s “Produce X 101” Trainees Song Yuvin And Kim Kookheon Will Form A New Duet Group
- Soompi: Kook Heon and Song Yu Vin from Produce X 101 confirmed to debut as a duo
- Soompi: MYTEEN Announces Disbandment + Eunsu Writes Heartfelt Letter To Fans
- Soompi: Kim Kook Heon And Song Yu Vin Reveal Official Duo Name
- Herald Pop: 김국헌-송유빈, 2인조 그룹 비오브유(B.O.Y) 새 출발‥역대급 男듀오 탄생
- Hankyung: 비오브유 김국헌X송유빈, 1월 7일 컴백 확정…타임테이블 공개