He sang the whole song. About Heeseung's cover this is a part of what was published in Korean news : Heeseung chose this song to express his pounding heart and happy emotions when thinking of ENGENE. He started singing to the lively piano accompaniment, and completed his own style by reinterpreting ‘this is what falling in love feels like’ with his unique sweet voice and chewy singing style. As the flow of the song intensifies, Heeseung adds sweet charm by pouring out brilliant ad-libs, doubling the lovely emotion with hand movements that resemble playing the piano and gestures that match the lyrics. Heeseung's ideas were reflected throughout this cover song. He suggested the direction of arrangement and the addition of instruments such as jazz piano, brass, and violin, and worked together with the producer to work on the arrangement, incorporating his own musical style. In addition, he paid attention to the entire work, from the large frame of the video, such as the concept of singing in a small theater and the composition that concludes with the ending credits, to detailed props such as hats. He is said to have improved the quality of the video by actively expressing his opinions at his filming site.

OmG, this boy is gonna be the death of me. Thank you for reacting. Love watching your reactions! This performance is just mesmerizing. Heheh, I'm guessing he is waiting for Engene to join him at the end😅♥️🧡

Always sucsess heeseung bring the cover....❤❤❤

Heeseung is the best!

La voz de heeseung es de otro mundo es tan hermosa

This KZfaqr Jake writes songs and performs them in his KZfaq. I agree This song is short though Heeseung performed it so well. I preordered the set for me. Please react to Jay in collaboration with Glay a Japanese rock band and they have a the behind recording for Jay. Looking forward to your reaction if haven’t yet. Also theirs a dance performance for Fatal Trouble, dance practice and TicToc

Tomorrow we will get to see Concept Cinema trailer😭. Can't wait I heard members and the director praised heeseung acting a lot🥺

My fav man with his wholesome voice ❤️

Brooo u need to watch their new concept cinema it’s so good!! And they were all badass

I recommend watching the live performance video of 'LookAlive' cover by Babymonster on YGE' channel. I hope you like it🙏🔥🔥