If you're looking for anime similar to Secret X Folder, you might like these titles.
Jinguuji Miko and her male assistant Kanda Rokuro hunt phantoms together. The phantoms invade people's bodies and control them. Trained as a skilled Phantom Hunter, Miko must use exorcism to send the phantoms back to where ever they came from.
Lately, shy Manami has been flirting outrageously and sparking vicious catfights! Afterwards, she remembers nothing. Can it be that another personality seethes beneath her own — a wild woman who'll do anything to find trouble?
The “harem x near-future sci-fi” story is set in a world suffering from a pandemic that has led to males worldwide suffering from erectile dysfunction. The story centers on Kazuki, a high school boy who is one of the few who can still get hard. He is harangued by his kind senpai, his horny teacher, a handsome girl who is the prince of the school, and the heir of a huge conglomerate.
Masquerade is the story surrounding the Hiraga bloodline in which Gen is a part of. Recently orphaned, he moves in to his grandmother's house and unwittingly triggers the Hiraga clan's curse in which nearly every member leads a tragically short life. In his grandmother's house, Gen begins to unravel vaguely remembered memories from a dream he's always had. With the help of an American graduate student, they try to uncover the secret of the Hiraga bloodline, the whispered legend of immortality that is locked in his genes, and a way to keep Gen from sharing the same fate that every one of his ancestors before him has suffered.
Two undercover agents Riko Ikazuchi and her junior partner Noma, who are infiltrating an apartment that is also the hideout of a criminal organization. They pretend to be newlyweds. However, when the culprits do not hear noise from them at night, they get suspicious. In order to convince the culprits that they are a married in couple in love, they start to touch and make some noise... Despite feelings of humiliation and pleasure throughout the undercover investigations, Riko endures it and devotes herself to her justice.