Yui Chan No Koibito is a Japanese giantess fetish movie. The special effects aren't the best and there are some scenes that are, in my opinion, a little too weird and go on a little too long. However, the parts that do work are really good. Here are some of the best scenes.
In this clip, a giant school girl "tortures" a little guy by sitting on him and smothering him between her thighs.
In this one, the school girl subjects her tiny boyfriend to some playful vore.
Then there's this lovely bit of bondage/size play.