In a battlefield's brutality, can love reign between two opposing nations?

[Could someone help me with a summary?] "All girls are princesses.Even if they dress in rags, even if they aren't pretty, or smart, or young. They're still princesses." - A Little Princess How can a young Knight make the love of his life feel like the princess she is, armed with only some flowers, and her friendship, and his love?(Purely Child!Hungary and Child!Prussia fluff)

Gilbert and Elizaveta finally united after they got separated for almost five years. But what happened after their meeting was nothing more than a tragedy.

When Gilbert Beilschmidt finds himself threatened with expulsion for his less-than-satisfactory grades and inability to control his temper, he reluctantly accepts the offer of being tutored and joining the cursed Oyster Club- a club ridden with the school's motley crew of delinquents and run by happy-go-lucky art teacher Ms. Braginski. Needless to say, Gilbert isn't terribly enthusiastic about his future experience, but his outlook changes when he crosses paths with childhood friend Elizaveta Héderváry.

Tired of her boring life at home with Roderich (Austria), Elizaveta (Hungary) sets out in disguise as a boy to the battlefield, where she meets her long-lost lover, Gilbert (Prussia). (Picture not mine; http://xkushinaa.deviantart.com/art/ProHun-render-292227173)

Elizabeta Herdervary had just had a recent break up with Roderich Edelstein and is usually locked up in her room, on her laptop. She had suddenly got a cyber bully on the Internet. She wanted to quit all her media and stuff when at the last minute someone she knows sends her sweet messages. Gilbert Beildshmidt is a blogger on the Internet. Though he's more active chatting with Elizabeta. He tries to make his childhood friend and current crush feel better on the internet since he's so far away from her. Deep inside, he wished she would just hurry up and figure out he likes her. But will she ever find out?