Till We Meet Again on the Lily Hill by Youichi Narita

6.30

Yuri is a high school student in the present day. She isn't happy with her life at home or school. One day, she has an argument with her mother and runs away from home. Somehow, when Yuri later opens her eyes, she realizes that she is in the year 1945. She happens to meet Akira. He is a pilot for a kamikaze unit in the military.