As AI-generated content rises, Diary Wan may become even more valuable. Why? Because a diary implies a human hand . Readers are already developing “authenticity meters” to distinguish real diary-style writing from AI slop. The genre’s future lies in —things machines struggle to fake convincingly.

Korean storytelling has taken the diary trope to a global level. Webtoons like (which began as a digital diary of makeup secrets) and "My ID is Gangnam Beauty" rely heavily on the protagonist’s internal scorecard—a diary of self-loathing and hidden love.

Korean romance suggests that writing about someone ties you to them. The act of keeping a diary is an act of devotion. The romantic storyline pivots not on a kiss, but on the moment the love interest reads, "I love him, but he will never know."