A boy who acts recognizably feminine. "Onee" type boys will often be of this demographic, owing to girlish speech patterns or hobbies.
Most characters of this type will have an interest in topics typically associated with femininity (dandy-style fashion, beauty, cute things, etc.) and often are depicted in coquettish poses. Common hairstyles may be wavy or flipped.
Not to be confused with otoko no ko (sometimes referred to as "femboys" in English), which is a boy whose physical appearance is feminine in possible addition to his personality. Also not to be confused with the term and archetype of "okama", though characters of either type can have girly boy traits.