Succubus and Hitman Vol. 7 (manga)

Shouya, Isana, and their team of proxy hitmen are in hot pursuit of Chan Louis. They've tracked him to a secret island off the coast of Vietnam, where they'll have to compete in a battle royale if they hope to take down Chan once and for all. But the world’s best fighters stand in their way, and they're not holding anything back. Let the deadly Solomon Combat Games begin!