A chance encounter with her former classmate's father leads to a whirlwind romance, complete with all the perks of dating an established actor. But when Y/N poses as his personal assistant to keep their controversial relationship private, things get a bit...messy. Warnings: Mature/sexual themes, age-gap, lots of angst, uses Y/N (regrettably lol pls roll with it), fem!reader. Disclaimer: Not based on Cillian's real life or family. Just wrote this for fun!