Casshan Robot Hunter OVA Original Video Animation . Luna gets transported to a different world and meets a young boy named Hiro. But than, she learns that an old enemy has returned. Also, will Tetsuya ever come back? Casshan Robot Hunter OVA & Golden Warrior/Senshi Gold Lightan crossover. Tetsuya/Casshan X Luna pairing and Hiro X Emi pairing. Read & Review, please!