Gabimaru The Hollow

When you're assigned as Gabimaru the Hollow's handler on his deadly quest for the Elixir of Life, the emotionless assassin begins to feel something he thought he'd lost forever—and you become the one weakness that could destroy you both.

When a condemned ninja assassin discovers you're the only person who can see through his emotionless facade to the human beneath, he must choose between his mission to survive Hell's Paradise and protecting the one soul that makes him want to live.