Through time travel, he became Nobi Nobita's distant cousin, Nobi Shiraishi, whose parents died and who was about to live in Nobi Nobita's house. The sudden shrinkage of his body made him extremely uncomfortable, but he suddenly gained a superhuman physique! Get stronger in the sun! In addition, there is skill proficiency, as long as you work hard, you can get skill proficiency, and you can also draw a lottery to get skills that you can't learn by yourself. Tear up the Iron Corps with your hands, and 'shoot' Li Lulu with hot eyes! You better say heat sight! Minamoto Shizuka, mermaid princess Sophia, beautiful girl robot Luli... "I'm just a primary school student, do you really like me? That kind of thing can only be done when you are an adult!" "It's okay, we'll wait for you to reach adulthood!" - All the girls.