Oldboy works well for learners who already understand English comfortably and want more challenging listening practice. At around 49 words per minute, the rhythm of the dialogue is manageable and easy to follow. The language can be demanding, as characters often use less common expressions and more specific terms. The complexity of the plot makes listening more challenging because learners also need to keep track of what is happening. For learners around B2/C1, this can be a practical choice for building vocabulary range.
