journey in time to protect my parents

Hana is a 15 years old little girl. she is the only hire of the k group ( k group is the largest AI machine company )." Mom ,is dad going to be late today also?"Hana said. "Yes,your dad is busy to develop a new project specially for your 18th birthday ". Hana' dad hanry is a famous scientists.he is planning to make a special machine for Hana that only she can use throughout the world. That is 'time machine'.He started to working on this project 4 years ago. And he is about to became successful on this.