Pretty Boy Detective Club

The Bishounen Series centers on the Pretty Boy Detective Club, a nonprofit organization located at Yubiwa Private Academy, with the purpose of helping those in need, but only if their requests are deemed as "beautiful" by the team's leader, Manabu Soutouin. The story begins when Mayumi Doujima, a girl looking to find the star she once saw ever since she was a child, encounters the Pretty Boy Detectives and requests their help for the case.

(Source: NisiOisiN wiki, edited)