Sad but realistic.
Spoilers to follow. In reality, there's no way this relationship would work in reality other than what is portrayed here. Occasional meets, no future together, as the successor marries and makes an heir. It might work for a while but eventually, the pain will be bigger than the love. The other couple briefly introduced seems to have a big age gap...another relationship with few possibilities for their future. These older style mangas make it hard to tell who's talking.
Never Let Go