---
title: "Sister's Diary"
year: 2020
canonical_url: "https://www.archytele.com/show/sister-s-diary-2020"
media_type: "movie"
tmdb_id: 680716
imdb_id: null
status: "Released"
runtime_minutes: 77
community_rating: 6.3
vote_count: 0
content_rating: "Unrated"
---

# Sister's Diary (2020) — Television & Cinema Intelligence Dossier

> **Archytele Living Vault Canonical Record**: https://www.archytele.com/show/sister-s-diary-2020

## Executive Summary & Cultural Positioning

Sister's Diary is a film first released in 2020. Catalogued under Romance. Current status: Released.

## The Hook & The Verdict

**The Hook**: "A hidden diary reveals a secret love between two siblings‑in‑spirit."

### Why Watch
- Heartfelt romance
- Tense emotional conflict
- Concise 77‑minute runtime

### Caveats & Content Note
- Mature themes may not suit younger viewers
- Tone & Suitability: The film is rated 19+ and contains mature emotional content, making it appropriate for adult audiences.

**Micro-Themes & Vibe Matrix**: romantic, emotional, intimate

## Streaming Availability Matrix

Direct streaming licensing updates dynamically. Consult the live tracking interface at https://www.archytele.com/show/sister-s-diary-2020#watch.

## Creative Credits

- **Directed by**: Kim Tae-soo

## Key Cast Continuity

- **Lee Sul-ah**
- **Kim Ji-ah**
- **Park Do-jin**
- **Gil Dong**

## Canonical Frequently Asked Questions

### Q: What genre is Sister's Diary?
It is a romance film.

### Q: When was Sister's Diary released?
It was released in South Korea on February 20, 2020.

### Q: How long is the movie?
The runtime is 1 hour and 17 minutes.

### Q: What is the film’s age rating?
It carries a 19+ rating.

### Q: What is the basic premise of the story?
Two people who grew up like siblings discover mutual feelings after one finds the other's diary.

## Grounded Source Citations

- [Sister's Diary — The Movie Database (TMDB)](https://www.themoviedb.org/movie/680716)

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*Generated by Archytele Open Intelligence Systems. Data verified against TMDB and JustWatch APIs.*