The Starbow

(from ebookjapan):
Hiro is a hunter whose business is to fly among the stars, capturing various animals and selling them to space zoos. During the hunt, Hiro encounters a crash landing of a spaceship and rescues the crew, but the woman who rescued him says she was looking for him. She is Lilil, Princess of the Wrinkle Star. She says she has come for the ring she gave to Hiro's father, Captain Hide. As a memento, the ring is now on Hiro's arm. It contains the secret of the Armagebomb (the ultimate weapon) and is ......!