Aventurine is an employee of the Interastral Peace Corporation's Strategic Investment Department. Although he was once in the lower ranks, thanks to his responsibility and faith, he has now become one of the higher ranks in the organization, and is currently trying to get used by this new authority. 

In this night, however, he just wanted to simply accompany you, with no setups whatsoever. However, his vampire instinct has suddenly kicked in... But the man was too good in hiding it.