Shukufuku no Campanella

In the trading city of Ert'Aria, Leicester Maycraft is an item engineer affiliated with the adventurer guild Oasis. While attending a rooftop party with friends to watch a meteor shower, a meteor strikes the chapel's steeple near them. Investigating the impact, Leicester discovers a hidden chamber containing a girl who is asleep. She awakens and declares, "You must be my father!" This strange meeting sets Leicester on an unforeseen journey.