After a random encounter at a bar, Hajime Hinata finds himself with a thirsty, flirty (but super cute) vampire on his hands. You really shouldn't read this it's so bad I suppose this is what you call a crackfic? I am not certain but it should be comedic

Shuichi Saihara, a shy and well liked boy is one of the most famous detectives to have ever lived. Known throughout the country as a detective who always finds the truth, and unmasks it. That is till one fateful encounter. A dashing phantom thief with a threatening organization is slowly building a name as one of the most famous thieves in the world. The race begins as to who gets cornered first. Kokichi Ouma, one of the most unliked people and is constantly being undermined and ignored who longs to confess to his childhood crush and only friend. Love meets mystery, two personas clash in the dead of night, with two stories unfolding in the light of the sun and moon.