ASTRO's Rocky gave a shoutout to his best friend SF9's Chani.

On the February 16th episode of 'Immortal Song', Rocky told a story of Chani, who had trained with ASTRO before debuting under SF9. Chani, who has sharply risen to fame recently thanks to the hit drama 'SKY Castle', had actually been Rocky's long-time and "the only friend" of his since their pre-debut days.

"Chani had spent time a lot of time with our ASTRO members for 7 years. Chani is my only friend," shared Rocky. As a short video message, Rocky spoke directly to Chani through the camera: "Chani, hello. We used to play billiards together just a month ago. Ever since you began to act in the drama, I have no friends to play billiards with. Let's get together to play again."

Guests and MCs of the show encouraged the heart-warming friendship of the two male idols. In related news, ASTRO performed their own, awesome rendition of Love and Peace's "Rose", just last week on 'Immortal Song'. Make sure to check it out, if you haven't!