Sebelum debut sebagai anggota [[BtoB]], Minhyuk akting di jTBC 'Living In Chungdamdong'<ref name="urlCube Entertainment’s new boy group completes a successful fictional debut">{{cite web |url=http://www.allkpop.com/2012/02/cube-entertainments-new-boy-group-completes-a-successful-fictional-debut|title=Cube Entertainment’s new boy group completes a successful fictional debut |format= |work= |accessdate=}}</ref> sebagai anggota Invincible Chungdam No. 3, bersama anggota Seo Eunkwang, Lim Hyunsik, Jung Ilhoon, dan anggota terakhir BtoB, Lee Minwoo.
Dibawah nama "Heota", Minhyuk fitur di lagu Zico dan Park Kyung (dari [[Block B]]), berjudul "여전히(Still)".
Minhyuk dan anggota Yook Sungjae dinamai sebagai MC baru untuk SBS 'MTV‘s The Show 2'.<ref name="url신예 비투비, SBS MTV 음악프로 MC 발탁: 네이트 뉴스">{{cite web |url=http://news.nate.com/view/20120320n10094 |title=신예 비투비, SBS MTV 음악프로 MC 발탁 : 네이트 뉴스 |format= |work= |accessdate=}}</ref> On March 20, they had their first recording as the new MCs of the music program.
