"A sun" sounds like "a son". This story from Taiwan is very moving and touching. It touch the complix feeling how traditional family under Chinese culture would fall into tradegy. But it also make it a crucial & sad turn in a warm and tender way, like the sunshine.
If your choice of doing something will change the world, what will you choose? Just choose what you want is fine, no need to feel guilty if the choice cause any effect. The world has it's own way to adjust themselves. Love this new anime movie.