My girlfriend is a harem protagonist

Kade's got a girlfriend, She’s cool, cute, and beautiful, talented in everything she’d perfect girlfriend. If it weren’t for the fact she’s cross dressing as a man and hiding her gender due to certain circumstances. And not only that she’s being chased after by his school most popular girls for her heart. And who's Kade in all of this? Well, if this were really a harem anime he'd be the protagonist’s sidekick. Good old perverted friend of course. (I do not own the art for the cover)