Suffering

Kawaki only had one precious thing in his life and that was Boruto, but the blond broke up with him out of the blue and moved away to a different city. He was left alone without knowing why and couldn't understand how the person he loved so much would hurt him in such a way. When their paths cross again years later, Kawaki wants nothing to do with him, but Boruto refuses to leave and wants to save what was left of his life. What happened all those years ago and what was going to prevent it from happening again?