When asked what drew him to the production, lead actor Go Soo stated, "I enjoyed its lightweight feel, like reading a sci-fi novel...But I got nervous and had sweaty hands after reading through it.
Ketika ditanya apa yang membawanya untuk memproduksi film ini, aktor Go Soo menyatakan, "saya menikmati nuansa yang ringan, seperti membaca sebuah novel fiksi ilmiah...Tapi, aku gugup dan tanganku berkeringat setelah membacanya.