[Siren Everlasting Classic ManLove: Erotic Alternative Paranormal Romance, M/M, shape-shifters, HEA] Tobias Luch is a mouse shifter who has had little interaction with the predatory beasts who fight in a no-holds-barred contest of strength. But when a wealthy investor drops by for an unexpected visit, Tobias is charged with delivering an important message to the beasts’ trainer. He doesn't realize that the errand will bring him face-to-face with a tiger shifter who is destined to be his mate. Cassisus Alferrik the Vain is legendary in the arena and lives at the adjacent training compound where Tobias works. When his mate wanders into his domain during practice, Cassisus is immediately and absolutely drawn to the man fate has given him. He doesn't care that they come from two different worlds. However, his indifference is not shared by others. He will have to fight internal and external enemies in order to convince his mate of the joy of their union and carve out a new normal within the confines of their world.