A sweet photo of ATEEZ's Yunho and San celebrating the '99ers' birthday.

A sweet birthday celebration photo of the '99z by ATEEZ members Yunho and San has been uploaded~~

This is a photo posted on Yunho's Instagram account, tagging San's Instagram account to wish him a happy birthday!

From the playful and affectionate abbreviation "Sanchuk," the strong bond unique to best friends of the same age

I can really feel their harmless chemistry, and it warms my heart haha.