One of my absolute favorite books of all time. The artwork is absolutely stunning, which is an added bonus. It is extremely traumatic at times, and it is very slow-burn, but Futaba and Kou's feelings are clear throughout the entire series; they were each other's first loves and they are soulmates. They might not have been aware of it the entire time, but it was clear to me as a reader that they never fell out of love. In short, they were always going to end up together, and, man, am I happy they did.
Ao Haru Ride