Chrono Trigger: Do Your Best, Chrono-kun!

Childhood friends Chrono and Lucca join the townsfolk of Truce gathering in Leene Square to attend the Millennial Fair: a festival held once every thousand years in remembrance of the Kingdom of Guardia's establishment. While the katana-wielding Chrono simply wishes to enjoy the festivities, Lucca decides to seize the opportunity to show off her latest device. Recalling Lucca trying to hide it from him the day before, Chrono starts searching for her invention. Along the way, he runs into Marl—an iron-willed girl armed with a crossbow—an encounter that may mark the start of an adventure across time itself.