Irene is effortlessly charming without trying to be, which becomes a problem when her best friend Claudia refuses to marry any of her three suitors because of her attachment to Irene. The suitors, a possessive Crown Prince, a smiling Duke with something underneath, and a cold Knight, all declare Irene their rival in love and threaten her life. Her only way out is to prove she belongs in that rivalry. Korean manhwa. Complete at 151 chapters plus side stories.

Read I Have Become the Hero's Rival manhwa in English, fully completed. Also known as: 남주의 연적이 되어 버렸다 · Namjuui Yeonjeogi Doeeobeolyeotda · Your Ultimate Love Rival · I Became the Rival of the Male Lead · Became a Match for Namjoo