I accidentally wrote a love letter to my master

Li Ran traversed to another world and became the Holy Son of a Demon Sect.


The system has awakened, and the first task released is actually to fall in love.


The Sect strictly forbids relationships between men and women.


Li Ran took the risk of being expelled from the Sect and wrote a love letter to his junior sister, but it was sent to the master by mistake!

What will happen to him?
Let's see.