What begins as a crush on Yunah turns into Jake thirsting over her angelic, gorgeous twin brother Heeseung, who Jake learns fairly quickly that this pink-loving, skirt-wearing boy is nothing but an obsessive maniac who eats boys like Jake for breakfast.

Jake keeps accidentally coming out and Heeseung keeps believing it's a joke.

Heeseung doesn't understand why all his schoolmates are going crazy over The Unsent Project, an archival website filled with notes to your past or current loved ones. That is until he searches his own name and finds anonymous messages that sound an awful lot like his ex-boyfriend Jake.