Okay, so here's the story... A tom named Aspenleaf was once a clan cat, and he fell in love with a she-cat, who was named Birchwind. Eventually, Aspenleaf left the clans and joined a rogue group. The rogues gave him the role of an Assassin. His first task was to kill Birchwind. After convincing from the rogues, and threatening of his death, he agreed. He ended up killing Birchwind, and to this day, he feels guilty. Meanwhile, Birchwind is confused and hurt, because she loved him as well. She is still wondering- Why did he do it?
Thanks to Cotton_star for the lineart lalaloopsyyspoollala