Drunk on Secret Begonias

[Young General seme VS flower-demon drunkard uke] The poppy flower demon An Yao is told that he was imprisoned in this valley because he committed an offense. He's been here for three hundred years, and life is so comfortable that he has never even bothered to find out what he did. Then a young boy barges in, pesters him to teach him calligraphy and swordsmanship, and eventually starts craving his body?