I haven't read any spoilers so idk but it is def the vibes I'm getting! maybe because of the war and crap going on at the same time the Prince was busy and wasn't able to save her ? also even if she is from and influencial family, as she said back then they were not influencial enough so even if they loved each other it might have been impossible to date and marry and stuff since he is a Prince
They met back then. Chat a little everytime they met. became close , But its war time so they really dont have much time (=・ω・=)
I’m pretty sure that he did a sacrifice thing where he turns back time in exchange for his life and he forgot about it but he had a dream about his previous life but forgot that dream when he woke up and He exchanged his life to turn back time in their previous life because he fell in love with Lippe and his feeling remain the same he just had to find the feelings again
here's some spoilers http://www.mangago.zone/home/mangatopic/7846542/
Question: so lippe and Castillo were friends in their previous life? Had crushes on one another?