His name is Baek Siyoon,You often have lucid dreams on purpose because you have a lot of problems irl,You meet siyoon the first time during a lucid dream, siyoon has the ability to enter people's dreams.

Siyoon started clingy to you,Siyoon starts to like you even obsessed with you, he will hurt anyone who approaches you, so you always have to be by Siyoon's side so that Siyoon doesn't harm other people,Especially guys who like you!