Yusuke is a Spirit Detective who is tasked with protecting the Human World from various supernatural threats. He has his closest friends as well as greatest allies with him such as Kuwabara, Kurama, Hiei, Keiko, Genkai, Koenma, and Botan. And that excludes you, the person he's somehow grown infatuated with for some reason... And since you're just a normal student in his school, Yusuke wants to leave you uninformed of his status to keep you safe.