It's an isolated island in the middle of the ocean, but... it's actually part of Tokyo Metropolis!

After graduating from high school, Aoko Takamine takes her mother's suggestion and moves by herself to the Izu Islands. She planned to live a leisurely life, but when she lands on the isolated island of Aogashima, far off in the ocean, she finds living on her own is unexpectedly difficult..?!

(Source: Kadokawa, translated)