Hai Step Jun

A young girl named Jun is highly intelligent and spends her time creating various inventions, including two small robots that become her closest companions. Her intelligence earns her a spot in college at a very young age, where she meets a classmate named Zero. He is older than his peers, disinterested in school, and into motorbikes. Jun, being much younger than most students, faces ridicule, as does Zero for his age and lack of academic focus. They bond over their shared interest in mechanics, and Zero agrees to join Jun for meals at Harbor, a restaurant run by her parents. Their relationship involves many adventures and conflicts as Jun, still a child, tries to connect with Zero, who is significantly older.