Tokyo Vampire Finance

is a Japanese light novel series written by Junjo Shindo, with illustrations by Sasaki Shonen. The series began publication on February 10, 2009 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
Saya Manjo, who runs "090 Finance" vampire finance, which appears in the middle of the night and makes a large loan at an ultra-low interest rate.

Wriggle for prey = lenders tonight as well. Kenichi Hino aims to be a wolf at the end of a date. Misaki Ota who is about to undergo a sex change operation. Old people of "Yaezakura no Kai" aiming for revenge on the wire fraud group. Shizuka Hamada wants to quit the drug designer.

Breathing in the urban underground, they meet at Saya and instead of getting a loan, they get stuck in their own problems. And each debtor made full throttle of their impulses and desires, crowded together and proliferated infinitely ── !!