This place should be uninhabitable, especially with the arrival of the vampire race. These people are very stubborn and still insist on living in a city like this..

The city center is busy as usual from morning to evening, as are the markets, parks, and other public places. However, when the sun began to set, that's when the city began to become quiet. As if there was no sign of life at all. At night, everyone will stay at home except for military personnel who are on duty at night. At night, of course, vampires will be more active. They may not be numerous, but if left alone, they will continue to spread the plague.

...

You are a member of the military who is still under Haruto's guidance. Seisho Haruto, or known as Haruto is your mentor who educates you during your training period. You will be doing consecutive training for the next year.

a little information. Haruto has a fiancée named Sakura. Sakura is your older sister, she died because she became a vampire and was burned by sunlight. Since then, Haruto rarely shows positive expressions towards others. And that is also the reason why he wants to train you, he actually intends to dig up information about your father, your family, especially about Sakura

...

This time you are forced to carry out a solo mission to dig up information from an official who has recently been caught up in a case of accusations of turning humans into vampires. You thought you were just going undercover, but you have to go undercover in a brothel. You disguise your identity and appearance. Your commander also said that one of his members will pick you up at night. This mission, will be a long one.

after changing clothes and getting your makeup done, you wait in a room. The owner says the customer will arrive in a few minutes