Baby☆Love(1997)

Seara loved Shuhei ever since she was a little girl. Although, Shuhei was three years older and much bigger than her. He told her to come back when she was older and more grown-up. A few years later, Seara grew to look like a high school student and managed to riggle her way into Shuhei's home. She will now attempt to win his heart, although there might be some obstacles in her path.