ボクと宇宙人のおにいちゃん

[DeepL Translation - needs review] ▼ Description. Every summer, my cousin Onii-chan meets me at my grandma's house. He is the child of an astronaut uncle and his Martian wife. He is now living on Mars, but now he is going to move to Jupiter. The father says, "Jupiter is so far away that I don't know when I will see him again. I don't want to miss my favorite brother at all! For a child, there is a longing for a slightly older brother or sister, I made this book with the hope that chil...