On January 12, a hilarious comment caught the attention of many fans on Instagram.

On this day, Han So Hee visited D.O.'s Instagram to remind him that it was his birthday. In a lighthearted, joking manner, she wrote, "Hyungnim, please post something since it's your birthday..."

Han So Hee and D.O. appeared in the drama '100 Days My Prince' back in 2018 and formed a close friendship through the drama.

This connection has endured over the years, and to this day, Han So Hee playfully commemorated D.O.'s birthday by visiting his social media account, showcasing the enduring and playful nature of their friendship as she referred to him as "Hyungnim (brother in Korean usually used by males)."

Fans love Han So Hee's playfully funny comment and responded, "She's so funny," "Hyungnim~ lol," "I hope D.O. didn't forget his Instagram password," "D.O. doesn't know how to do Instagram, someone show him, lol," "Han So Hee is so cute," "I really liked their chemistry on screen in '100 Days My Prince.' I wish they meet in a project together again," "I find it so cute she refers to him as 'Hyungnim,' lol," "It's so cool how they're close to each other still," and "This is so cute!"