Yaoi I can’t remember

Anyone remembers the title? I remember that the seme has a fighting ring and force the uke to compete on it. I remember the scene in which the uke lost the necklace and the seme instead give him a tattoo on his chest …. In the end the seme regrets when he found out that the uke did not abandon him when they were running away when they were children … the uke injured his leg when he is trying to reach to the hospital trying to get help for seme …