Your Idols Are Vampires

It was Jeanne's dream vacation. Along with her trusted friends and colleagues, they will spend their time in the land of the rising sun. All was going well until a tiny problem had gone overboard. The Idol group that she always found overrated and downright creepy had ruined her most-awaited vacation and because of an unexpected incident, she uncovered the idol group's deepest darkest secret... They were vampires.
Additionally, her longtime unrequited love suddenly confessed to her which turned out to be an act out of jealousy because one member of the said group seemed to have caught an eye for Jeanne and started treating her nicely.
But the attention wasn't anything sweet at all, in fact, there was only one thing that the idol member wanted from her... Her sweet-smelling blood... or is it...?