A red band, a ring, connected to a fateful opponent.
When a red ring appears on the ring finger of your left hand, you cannot fall asleep unless you are in contact with that person.
But my ring is with the brother of the person I had a crush on for 5 years…
Shin Woo-seo, who has had a crush on his best friend Kang Ji-Seok for the past 5 years is suddenly linked to Kang Ji-Geon, the eldest brother of Kang Ji-Seok.
Kang Ji-Geon who repressed his feelings of Shin Woo-Seo for the past 3 years is suddenly filled with an overwhelming feeling that was close to ecstasy once the red ring appeared.
Ji-Geon plans to change the shape of their formal relationship, even if Shin Woo-seo doesn’t want it.