Kyokan Hunter is a Yaoi manga which has adult themes and adult situations and is not recommended for a younger audience. The story features a frightening and impossible to catch a thief who has a taste for stealing art.
He hasn’t yet been caught and is able to get past every security system and is able to make it past even the best of defences. Making him a huge problem for all the greatest art galleries and museums in the world.
However, he seems to have a kind of a fetish. If he comes face to face with a guard in a museum or an art gallery he asks him to sleep with him. If the guard does he stops and does not take the piece of art.
In a similar incident, he meets a guard who falls for the scheme and sleeps with him, only for the thief to develop feelings for him. When they both decide they are mutually attracted to each other the thief leaves in Kyokan Hunter Manga. But things take a turn for the worse when the thief’s younger brother comes in with a gang of men to rape the guard.