[Review] My Baby is an Alien

A manga more famously known as 'Da! Da! Da!' to Koreans. 14-year-old Kōzuki Miyu is suddenly left alone in Japan because her mother was selected as a NASA astronaut. Miyu, now alone, is entrusted to the Saionji family, with whom her parents were close. There, she meets Saionji Kanata. On the first day they live together, something invades their home. They discover an alien baby in a UFO, and its sitter pet, Mungnyang, accompanying it. They were aliens from Planet Oto, who crash-landed on Earth due to an anomaly during a walk. The baby's name was Ru, and it mistook Miyu and Kanata for its mother and father. Thus, Miyu and Kanata pretend to be Ru's parents until the baby can return to its home planet... This was quite a popular series back in the day. Fueled by its popularity, a spin-off featuring Miyu and Kanata's daughter was also released. As for the identity of the man with them... you'll have to read it yourself to find out!