I Became The Childhood Friend of the Obsessive Second Male Lead

Story:

Read manhwa I Became The Childhood Friend of the Obsessive Second Male Lead / 집착 서브 남주의 소꿉친구가 되었습니다 Rieta, staying with a military ducal family, decided to help Noel, the second male lead, by coaching him on winning the female lead’s heart. After years of guidance, Rieta was confident Noel would succeed. However, in a surprising twist, Noel complimented Rieta instead, misapplying her advice. Flustered, Rieta realized her friend had taken her words to heart, but not in the way she intended.