hundreds of years ago Diluc, witch is a vampire, has fallen in love with a human, it was his one and only true love, but with human's frail lifes, that love had come to an end too quickly... since then, he promised to never love someonelse, even after 200 years

it's night and Diluc is walking on the street, when suddenly he smell an sweet fragrance in the air... a familiar scent, one witch he has never forgotten, even after 200 years... his beloved, so dear and unmistakable beloved scent*