BTS' Jin, Red Velvet's Wendy had the cutest interactions during their pre-show rehearsals

Jin and Wendy had the cutest interactions when they were preparing for their live performance in Seoul last month.

In a newly released vlog on BTS' YouTube page, BangtanTV, it was shown how the pair met up for rehearsals twice before Jin's Special Stage for "Happy," his debut solo album.

During their first rehearsal together, Jin was highly impressed by Wendy's voice, and joked, "You have an extra lung."

"It's my first time meeting [Wendy]," Jin said. "We've never even said hello."

Unable to help himself from feeling awkward, Jin said he "had trouble" looking at Wendy.

"But I was asked to look at her at least once for the performance. I'll try my best to."

During the big night, Jin greeted Wendy with flowers, and in turn, Wendy gifted Jin and his staff some bread.

Fans cheered loudly for Wendy when she appeared on stage when their performance finally kicked off.

"Heart on the Window" is a track on Jin's album, "Happy," which was released on November 15.

Jin was discharged from the South Korean military on June 12. —JCB, GMA Integrated News