Sister's Diary ending explained
Spoiler summary page for informational search intent.
What happens at the end?
Ga-eun and Su-ho grew up like brothers and sisters. However, Su-ho never showed that he likes Ga-eun ever since they were young. One day, Suho accidentally found Ga-eun's diary and found out that she also likes him. Su-ho reveals his feelings to Ga-eun. Ga-eun is not his real sibling, but to protect their parents, she rejects him...
Why it matters
The ending resolves the main conflict and sets up the emotional takeaway of the story. As the index grows, this block can be auto-generated with more detailed scene-level commentary.
FAQ
Does this page contain spoilers?
Yes. The explanation summarizes major ending events and interpretation.
Where can I find similar endings and themes?
Check the similar movies page for related tone and narrative structure.