That's kinda ironic. Since like in chapter 2, the ml literally says "I'm the real saintess's twin brother"... Ur the one complicating things up, u forgot that he's twins with the real saint. And for user aki, it's so easy to think why he had to transform into his 14yr old self... CUZ HES BULKY when he's in his original age...
Anyways, the saint has to be 19, they can't be twins if she's 14(duh). And since u(Loli) said the saint and the fl is in the same age group, then it must mean the saint has to be 17-18(go back to chapter one, the fl states before she died, that she's a Korean highschool SENIOR.), SO in conclusion, the fl has to be 17 OR 18, and the saint is 19. Also, where did u get that the fl and saint is in the same age group? Sorry, I'm not sure which chapter it states that the fl is 14.

whys the ml lowk a predatorrrr im crine.. Isnt the fl the same age as the saintess (14),,??1?1? wdym shes supposed to fall in love with the 19 year old????????