Devil Boyfriend

From Chibi Manga:
The daughter of the priest, Shino, is suffering because of her height: she's tall. Only one person she accepts to see is her childhood friend, Shun-kun, who's coming from London. He's really cute and has the same smile as before when he said "I wanted to see you for a long time". Shino then fell in love with him but had soon found out that he was keeping a terrible secret....!