HAHA Sunny Day Young K Behind the Scenes

Ever wondered how HAHA’s latest single Sunny Day (Feat. Young K of DAY6) came to life? This HAHA Sunny Day Young K behind the scenes look proves some of the best tracks are born from pure spontaneity and good vibes.

Young K only dropped by HAHA’s studio for a quick visit — but HAHA threw out, “Wanna try it together?” In five minutes, a quick hum turned into the top line that even HAHA’s son Dream couldn’t stop singing.

Even with his own album Maybe Tomorrow coming out the very next day, Young K jumped into the booth. He teased a quick promo for his fans — “Please give lots of love!” — then knocked out his first take so smoothly that the producer joked he could head home already.

But of course, the magic is in the tweaks. They fussed over every detail: softening lines to balance HAHA’s style, tightening the harmonies, and locking in that cheeky “Brrrrra” ad-lib that nobody wanted to cut.

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When the outro became a debate — neat and clean or with vibrato? — they voted. It tied! So Young K solved it in classic style: one version for the album, the other live. Problem solved, everyone laughing.

Through it all, the vibe stayed warm and playful. Young K kept dancing in the booth, HAHA kept praising him so much that Young K had to hide his shy grin behind his hands.

When the final line hit, HAHA half-joked he wanted to “take that voice home.” Everyone hit playback one more time — grinning like friends who know they made something special. For more Korean entertainment news, check out the link below.

Alternatively, watch the full release here: