This reminded me quite a lot of "Suzume" from earlier this year, only here we have a tunnel rather than a door! It's the same boy meets girl type scenario - with both Kaoro and Anzu coming from families with tragedy in their recent history. Legend has it that the Urashima tunnel can grant you anything you wish - but it works out that for 108 seconds in there it takes 3 days off your life in the real world. Kaoro is determined to get his younger (and frankly rather annoyingly enthusiastic) sister back; Anzu to discover the secrets of her grandfather's manga writing so she can excel. The two meet...