does anyone know this manwha? PLEASE I REALLY WANT TO READ THIS MANWHA!!!

The FL is the heroine of the novel she transmigrated into. In that novel, she has a fiancé (blonde hair), a mage, and a swordsman. They all are a group that is going to kill the dragon. They go to the dragon and kill it. but the dragon actually turns into a guy (black hair, and red eyes) and losses his memories. Before that happens the FL loses consciousness and after she woke up, the fiancé wants to annul their marriage/relationship, the mage ( he gave a part of his soul or something to her and that was a kind of protection) wants it back, the swordsman wanted to break his oath to protect her. They all wanted to do that because an unknown side character appeared. Now she is becoming the heroine and the FL a side character. In the middle of all that happening, the FL gets into trouble and the dragon saves her, not knowing who she is. The dragon got suspicious, and he ended up getting invited to stay in FL house temporarily.