Bad Thinking Diary 
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Description
Minji and Yuna were always together. From the age of 17 to now, until the age of 21, they have been each other's best friends. From that day on, the relationship subtly changes. It started with Minji's strange dream in which Yuna appeared! Their relationship begins to turn into something other than best friends.
Unrequited love, excitement, and obsession. "Bad thoughts" that grow one after another in each other's mind.
Where will our "bad thoughts", which started on a lush college campus, end up?
Original Webtoon:
Lezhin, Naver Series, MrBlue, BookCube, Comico
Official Translations:
English
Type
Manhwa
Related Series
N/A
Associated Names
BAD THINKING DIARY：バット・シンキング・ダイアリー
坏想法日记 / 闺蜜至亲 / 坏思想日记
배드띵킹 다이어리
Groups Scanlating
N/A
Latest Release(s)
N/A
Status in Country of Origin
60 Chapters + Review (Complete)
Completely Scanlated?
Yes
Anime Start/End Chapter
N/A
User Reviews
N/A
Forum
0 topics, 0 posts
Click here to view the forumUser Rating
Average: 6.7 / 10.0 (111 votes)
Bayesian Average: 6.61 / 10.0
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6%
Last Updated
January 1st, 2026 6:54pm PST - 3 weeks ago
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Genre
Categories
Category Recommendations
Recommendations
N/A
Author(s)
Artist(s)
Year
Original Publisher
Serialized In (magazine)
N/A
Licensed (in English)
Yes
English Publisher
Activity Stats (vs. other series)
Weekly Pos #556 (-153)
Monthly Pos #1180 (+164)
3 Month Pos #1665 (-613)
6 Month Pos #2350 (-71)
Year Pos #2431 (-151)
List Stats
On 246 reading lists
On 164 wish lists
On 183 completed lists
On 25 unfinished lists
On 126 custom lists
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