If you loved Tunnel to Summer, try Stand by Me Doraemon 2
Eine Brücke zwischen einem Film, den du schon gesehen hast, und einem, den kaum jemand kennt. Das teilen sie, und was der zweite macht, was der erste nicht macht.
Was sie teilen
Theyboth carry the foreign gem mood tag, and they sit in Animation / Drama / Fantasy / Science Fiction territory. If that's the register that drew you to Tunnel to Summer, the second film will land in a comparable space — through a different lens.
foreign gem
What Stand by Me Doraemon 2 is
Apparently someone's cold feet are time-travel worthy. Nobita travels to the future to show his grandma his bride. It predictably gets messy.

