LOONA TV #90 is the ninetieth episode of LOONA TV.
LOONA 1/3 land in Hong Kong. HaSeul tries to greet the camera in English, but forgets LOONA's English name, having to be reminded by ViVi. In turn, ViVi introduces the group in Korean, and HyunJin speaks in her own made-up language.
- HaSeul's "Hi guys! We are… um… 이달의 소녀…" became a minor meme among the fandom.