おしゃぶり先生～ワケあり優等生の弱み～

At first, I didn't think much of it... I did it once and didn't get caught. It worked the second time, too. Before I knew it, it had become a habit. I know I shouldn't be doing it! That's right. In order to keep my spot at the top, I'm cheating. But we're suddenly given a pop quiz! I panic so much that I go pale, and my homeroom teacher sends me to the nurse. Does he have me figured out...? The top student is cheating! On top of that, the teacher who found me out is actually gay...!! Can a (straight) boy warm up to the guidance of a (gay) perverted teacher?! Or will he get addicted to this new, forbidden world?! (Source: MangaPlaza)