Dad's Assassin: Ryunosuke Flies in

Sinopsis

Fourteen years ago, an assassin named Daniel was looking forward to retirement when a mysterious woman entrusted him with a young boy. Now, Daniel is a single father raising Ryunosuke, a high school student. Daniel is popular with women and works in manual labor, a far cry from his dream of managing an art gallery. Ryunosuke has a happy life with caring friends, but he harbors a secret from Daniel. As Ryunosuke grows more distant, Daniel begins to notice his strange behavior.