He is a classmate of Miyu and Kanata. Miyu thinks he is an alien because he seems to be stalking her.

Miyu is an 8th grade girl, whose parents have been hired by NASA. They take off to America leaving Miyu with Mr. Saionji. Later, Mr. Saionji decides to go on a 1 year long trip to India leaving Miyu alone with his son, Kanata. More complications rise when an Alien baby and his babysitter pet crashes/lands in their house. To make things worse, alien baby starts calling Miyu and Kanata Mom and Dad, also showing ESP power and floating around.
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(Source: Anime News Network)

Miyu is an 8th grade student. Her parents went working in NASA and they left Miyu. For a moment, Miyu was sent to stay with her Uncle. The first day when Miyu arrive to her Uncle house, her uncle decide to go to India and left Miyu with his son, Kanata. First time, Miyu thought she will stay in her uncle house only with Kanata. But this no longer happen. Soon, there is an UFO landed in Miyu's uncle house. Inside the UFO, there is an cute baby, name Ruu and with his babysister, Wannya...<br><br> (Source: AnimeNewsNetwork)

Nozomu Hikarigaoka