"Apink" reveals the secret to the group's longevity: "We've been together for 14 years, but we still use honorific language with each other" = "Knowing Bros"
Yoon Bo-mi (Apink), who is in a relationship with Rado, confesses her feelings in a handwritten letter, "I'm worried that the PANDAs will be shocked"
Actor Chae Jong Hyeop stars in singer-songwriter Baek A's "Letter" music video released (video included)
