I have watched until episode 6. In my personal opinion the script except minor flaws is outstanding and stands out from the rest kdramas who keep repeating the same love cliches… ( I have watched over 100) This is something different. Comedy is combined perfectly with action which is unique for sci-fi genre series !!! The performances of all the cast is excellent !!! In my country 🇬🇷 we only care if someone is good actor/actress, not age or beauty. Because actor comes from the word ACT !!!