I'm not sure specifically as there could be many different versions of such a fanfic. But generally, it might involve an alpha character, who is usually a dominant figure in a werewolf or some supernatural setting, forming a mating bond with a rogue, which is often an outcast or a character not following the normal pack or group rules. It could be about their journey of dealing with this unexpected bond, facing opposition from the alpha's pack perhaps, and how they grow together in the relationship.
As the title suggests, the two main characters are likely to be the alpha and the rogue. The alpha is probably a strong, dominant character within a group or community. The rogue is someone who is outside the normal structure, perhaps an outcast or a loner.
Well, start by researching popular alpha manga series and see what makes them appealing. Also, follow manga forums and communities to get recommendations.
Well, it's often about a female character who is mated to the lycan king. It usually involves a world of werewolves, with elements of their culture, hierarchy, and power struggles. There's typically a romantic relationship at the core which develops between the main female character and the king, along with her journey to adapt to this new and often dangerous world filled with lycan politics and rivalries.