If I Can't Have You, No One Can

Kara and Mon-El live in the same apartment block as Lena Luthor. They get into an argument not realizing anyone can hear them until Kara catches the scent of an unforgettable perfume floating down from the balcony above.

Kara breaks up with him and moves on, finding comfort in her new found friendship with Lena only for Mon-El to start causing problems when he gets jealous seeing them getting closer and how happy Lena makes her.