The Black Diary summary:
"I'm going to live a normal life!"Cho-eun, the heir to the underworld organization, Red Arrow Group, has finally entered university.She just wants to make lots of friends, but finds herself surrounded by four suspicious men."Are you an enemy? Or a friend? Or... do you like me?"With a whirlwind of emotionsjoy, anger, sorrow, and pleasureengulfing her twenties as a freshman, will Cho-eun's dream of a normal campus life come true?