x0unerthanlater
`my dragon's blood is blue`
The Lustful student was Crown Prince Jung Hyun. Sung Yeol was is bodyguard... He left "the secret to kill Gwi" in his diary of some sort. 110 years later, Crown Prince Sadong found the diary and threatened his father (the current King) that he would expose Gwi. He was then accused of Treason (same reason as C.P. JungHyun). Gwi killed him and his body is now hanging in Gwi's dungeon... 10 years after this incident, which is present time now, his son Crown Prince Lee Yoon is looking for that diary. C.P. Lee Yoon claims the pseudonym "The Lust Student" to bring both the deaths of his father and C.P. JungHyun to light and reveal Gwi. Gwi claims that he's already destroyed diary.
The bookseller that Yang Sun keeps bothering was Crown Prince Sadong's personal bookkeeper in the past. He somehow conspired with the King&Gwi, and was the one witness that accused Crown Prince Sadong of committing treason. That's why when Crown Prince Lee Yoon asked him about the diary, he tried to kill himself my biting his tongue. Somehow, Yang Sun's father also knows something about the diary. That's why he vehemently forbids her from trying to find out about it.
I don't think Hye Ryeong is Myung Hee. It's a new girl. The reason she didn't tell Gwi she met someone who called her Myung Hee was because she knows that once she does, Gwi will kill her. She will become useless to him. She probably has her own reasons in wanting to stay close to Gwi.
Hopefully this all makes sense.
The bookseller that Yang Sun keeps bothering was Crown Prince Sadong's personal bookkeeper in the past. He somehow conspired with the King&Gwi, and was the one witness that accused Crown Prince Sadong of committing treason. That's why when Crown Prince Lee Yoon asked him about the diary, he tried to kill himself my biting his tongue. Somehow, Yang Sun's father also knows something about the diary. That's why he vehemently forbids her from trying to find out about it.
I don't think Hye Ryeong is Myung Hee. It's a new girl. The reason she didn't tell Gwi she met someone who called her Myung Hee was because she knows that once she does, Gwi will kill her. She will become useless to him. She probably has her own reasons in wanting to stay close to Gwi.
Hopefully this all makes sense.