Ima, Soko ni Iru Boku, Saishuu Heiki Kanojo Recommendations
Both series are very emotional and contain tragedy and drama themes.
Both series' theme are also quite similar involving a destined meeting and has a similar taste.
Both series convey war and humanity and conveys the horrors of it in its finest form.
The main girl in both series are also being used as a weapon and the main protagonist tries to protect them while making a future with them.