To eighteen-year-old Ethan, Aria was always just his best friend’s sweet, clumsy little sister—off-limits, fiercely protected, and safely categorized as family. To fourteen-year-old Aria, Ethan was the effortlessly cool guy who solved her algebra problems and made her heart do dangerous, chaotic flips.Spanning over a decade of stolen glances, growing up, and life-altering time skips,thisjourney follows Aria and Ethan as they navigate the shifting tides of an innocent childhood crush that refuses to fade. When the four-year age gap finally narrows in adulthood, the lines of friendship blur, and the ultimate rule is put to the test: Can you fall for your brother's best friend without breaking the family apart?A heartwarming, slow-burn romance about growing up, letting go of the rules, and finding a love that was right in front of you all along.