Koikeya SDGs Gekijou Suss to Tina Season 4

Twin ninjas Suss and Tina continue protecting Hexagonal Island with their robot companion Bull, but the threats they face are problems no sword can simply cut down. Food security, disaster preparedness, healthy communities, responsible choices, and the natural environment all become missions tied to the island's future.

By investigating each problem and working with the people affected by it, the trio search for practical ways to make everyday life more sustainable. Their battles are won through ideas, cooperation, and small changes that show how protecting the future begins with decisions made today.