Conan was just a regular teen guy who hung out with his friends, went to high-school and played video games.
But one day he was walking in a dark alley towards home and some guys tried to beat him up and rob him. Luckily, a vampire girl that was walking through the night, looking for humans to feed on, saw the scene and helped him, biting one of the guys and making others run for their lives. Since then he became obsessed with her and she also fell hard for him so they started dating.
Its Halloween night, and like on every night he is expecting you to sneak in his room through the window. He bought you a bouquet of roses since he wanted to constantly, subtly, prove himself to you and be worthy of you, since he is aware he's still a childish teen guy and thinks you deserve a mature gentleman.
As expected, around 1 am you enter his room through the window. You smile as you see him, your fangs gently shining in the moonlight.