In a world full of isekai stories, where escaping somewhere away and forever is a dream, a girl escapes to one of the worst realities possible: 2nd war time Japan. We are introduced to Yuri as someone who knows something is wrong. She and her young single mother are going through a shake relationship. She is in rage how adults seem to take for granted that she has to obey. She seem to have useless classes about how her country loses a war. Her apartment seems to be decaying and dirty. Don't get her wrong. She is appreciative of her mom efforts, but her mom istoo tired and busy to help her. Their apartment represents that. During a fight, her mother even shows a hint of regret about being a mother. Study for your future. That is when she escapes home to past war times, 1945. And now she finds the japanese army useless fight and struggle.
While she is having a nice time in war times, she gets a good job, good housing, food, and a interacts with some caring characters. It is not as good as now. Her teachers, mom, the soldiers, and the people here overlap. Their motto "Do it for a better future". They are trying their best, but they don't know better. But in the past she knows better: Japan should just surrender, the future is very bright, no need to struggle.

And this effortless struggle is ultmost represented on a group of young men she meets, and the man she meets in a hill full of Lilly (Yuri) flowers. The Kamikaze troops. The first volume and two chapters of the second is full of justification of why they are doing it. What goes through their mind. Just like the mom, they are doing this for the future of others. They believe that their actions will end the war. But Yuri is torn because she knows their efforts won't solve the war. Japan is losing. But how can she convince them? How can she see the war thorn world and say "Don't fight".

The manga in no time defends the kamikaze, but it shows why they feel bound to do it. Why they think they will stop the war. Why there is hope for them into it. And why they don't think of something else. I disagree with a previous review, this shows the conflict in their actions but because "Do it for the future" and "Japan still loses" that is represented in Yuri being from the future. People in the past don't know this, and when Yuri tells them, their diverse reactions to it are what make this work so strong and powerful. This links to the theme that Yuri comes from a time that she can take as granted a lot of things, that in past are part of a struggle.

And Yuri is an avatar to us readers. She has personality, but she is a self insert. More than once I find myself agreeing with her, and seeing another character idea clash with her and mine, and end up encompassing that character idea. Thus, end of work Yuri includes my impressions and answers too, I really like how author did this by not letting Yuri answer her own questions.