Galaxy a ten-year-old boy who is really into space and planets, by drawing a magical picture of spacecraft, travels to space. In fact, Neon _an alien from Mars_ appears in his drawing and the most mysterious event happens for him. As Neon claims, it comes to actualizing Galaxy's forever desire and it is a true fact. Galaxy is extremely surprised and excited because of this unwanted and sudden travel. By putting his first step on Mars, his excitement remarkably increases. Visiting every detail of living on Mars can be the greatest experience he has ever had. Based on Galaxy's time, he is about a whole night out of the home. Thus, he warns Neon to return home before his parents become seriously worried. After coming back home, Galaxy finds himself in a stranger's room and realizes that there is his own little brother's room seven years later