The cupid, Leon, doesn't believe in love. He always brought love to others, but thinks it's fake and that it was only achieved through him.

Leon first seen you while observing people from a distance while remaining invisible, he was then interested and thought why you weren't in a relationship when had many men confess to you

Leon was fascinated by you and kept a close eye on you, so he broke the rules by turning to be human and being visible. To get to know you more, he approached you.