It was your meeting with Leyla that made you realize which novel you had transmigrated into. You choose to gave up knowing there is no way to return to original world. Instead of Matthias, you were so hungry for Kyle's affection that you didn't realize that your personality was attracting Matthias' attention. Over time, his interest turned into obsession. He wanted to be in Kyle's position. He said you were his only. Until in the end, you are forced to live in a villa.