Observation Diary
Also known as Observation Diary / Diario de Depravación / 관찰일기
From a steamy one-night stand with a tattoo artist to a nude selfie in a deserted park… This observation diary steals a peek into seemingly ordinary, intimate moments!
Chapters 30 chapters · Updated
Chapter 30
New
Chapter 29
Chapter 28
Chapter 27
Chapter 26
Chapter 25
Chapter 24
Chapter 23
Chapter 22
Chapter 21
Chapter 20
Chapter 19
Chapter 18
Chapter 17
Chapter 16
Chapter 15
Chapter 14
Chapter 13
Chapter 12
Chapter 11
Chapter 10
Chapter 9
Chapter 8
Chapter 7
Chapter 6
Chapter 5
Chapter 4
Chapter 3
Chapter 2
Chapter 1
Chapter not found.
About Observation Diary: Manhwa Hentai
Drawn by TAIRA, Observation Diary is an ongoing manhwa. Readers who enjoy drama, romance and slice of life will feel right at home here. It began on October 21, 2024 and has 30 chapters so far, the latest being Chapter 30 on January 12, 2026. New chapters have usually arrived about once a week. No new chapters have been added since January 12, 2026. It is one of the most popular titles on Hentai18, in the top 3% by readership with 47.2k reads and 77 saves.
Frequently asked questions about Observation Diary
Does Observation Diary have another name?
Yes. Observation Diary is also known as Observation Diary / Diario de Depravación / 관찰일기.
Is Observation Diary completed?
Not yet. Observation Diary is still ongoing. The latest chapter is Chapter 30, added on January 12, 2026, and new chapters are added as soon as they are released.
How many chapters does Observation Diary have?
There are 30 chapters of Observation Diary on Hentai18, from Chapter 1 to Chapter 30.
Where can I read Observation Diary online for free?
You can read all 30 chapters of Observation Diary online for free on Hentai18, with no sign-up required. Start from Chapter 1 or jump straight to the latest Chapter 30.
Who is the artist of Observation Diary?
Observation Diary is drawn by TAIRA. Open the artist page to see more of their work.
What genre is Observation Diary?
Observation Diary is a manhwa in the Drama, Romance and Slice of Life genres.
Is Observation Diary available in English?
Yes. Observation Diary is available in English on Hentai18.
How do readers rate Observation Diary?
Readers rate Observation Diary 3.6 out of 5, based on 19 ratings.
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