TREASURE‘s Hyunsuk shares the meaning behind his trademark “7Chill” and why his favorite number is 7, and the reason is unexpectedly soft.

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In his recent birthday live broadcast, a fan asked Hyunsuk to explain his trademark “7Chill.” He shared that “Many things in [his] life are related to 7,” so that’s why it’s his favorite number.

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| @treasuremembers/Twitter

While he had previously shared a few reasons as to why 7 is his favorite number, he shared an additional reason that had to do with his family members’ birthdays.

As for the “chill” part in “7Chill,” Hyunsuk said that it was his favorite English word, and it sounds like the Korean pronunciation of the number 7. Seems like the perfect combination!