I Want to Say She's My Girlfriend, But I Can't

"I swear nobody will ever discover this, so please don’t end things with me—!" Koharu finally enters a romantic relationship with her childhood friend Yuzuki. However, his club has a strict no-dating policy, requiring them to keep their love hidden. At school, she can only observe as other girls try to get close to him—despite the fact that she is the one who is truly his girlfriend. A concealed love story between childhood friends, marked by sweetness, jealousy, and unexpressed feelings.