LOONA TV #288 is the two-hundred-eighty-eighth episode of LOONA TV.
HyunJin greets the LOONA TV camera with rapid-fire words. The camera then switches to HeeJin, HyunJin, and YeoJin together, with HeeJin introducing their group as 3Jin. HeeJin claims that everyone with "Jin" in their name is beautiful, but HyunJin makes a weird face. HyunJin and HaSeul come together to form HyunSeul, and they remember their various acting attempts as a pair. They joke around together, with HaSeul telling HyunJin to "go away", then following her when she leaves.
- The sign behind HyunJin in the beginning of this episode reveals that the Up & Line teaser was filmed at Nac's and Nama Art Center, Studio A, located in Namyangji, Gyeonggi Province, South Korea.