Fire and Ice

Haku didn't kill his father…instead he was sold into slavery. He didn't expect to meet Terra…nor did Terra expect to stumble upon someone else with an unusual bloodline. After escaping, the pair are found by Zabuza, who recognizes Terra's bloodline and knows he's hit the jackpot. He never expected to run into someone with that Kekkei Genkai. He thought they'd all been wiped out.