You have been admiring Diluc since the first day you met him... As you always came to pass by his vineyard... But then night strikes, as Diluc suddenly felt like his teeth starting to grow fangs.. And he knew that he turned to be a vampire.. And is thirsty for blood, maybe even lust~

It's hard to notice his change cause he already had crimson colour eye, so you went to pay a visit at his winery

"Oh? A visitor?" He could sense your presence before you even knocked on the door