Bad Thinking Diary < Hot >

Initially appearing as the more "innocent" or confused party, Min-ji’s character arc is a fascinating descent into accepting her own desires. Her internal monologues provide the "Diary" aspect of the title, letting readers see her mental struggle firsthand.

: The main antagonist who actively schemes to sabotage Minji and Yuna's relationship for her own amusement. Bad Thinking Diary

By the end of the narrative arc (spoilers avoided), the diary doesn't necessarily disappear. The bad thoughts don't stop entirely. But the protagonist learns to stop treating every thought as a fact. She learns to close the diary, take a breath, and look at the person in front of her rather than the monster she painted in her head. Initially appearing as the more "innocent" or confused

A surprising side effect of keeping this diary is improved communication. Most relationship fights happen because both partners are reading each other's minds and catastrohizing. By the end of the narrative arc (spoilers

The story explores how trauma and past experiences shape our "bad thoughts." It looks at how insecurity can turn a healthy friendship into something possessive. The Characters

The focus on internal thought processes makes the everyday drama feel more urgent and "extraordinary". What to Consider High Drama & Toxicity: This is not a "fluff" series. The plot is heavily driven by miscommunication