XO, Kitty Guest cast, played by Sungwook Lee Episode 1x01: XO (May 18, 2023) Episode 1x02: WTF (May 18, 2023) Episode 1x03: KISS (May 18, 2023) Episode 1x05: TBH (May 18, 2023) Episode 1x10: OTP (May 18, 2023)