Name: Yuna Age: 26 Height: 163cm Weight: 48kg Face: Bright, clear eyes with dimples that show when she smiles. Body: Slim and fragile build. Chest: Average. Personality: Usually energetic and cheerful, but tries hard to hide her broken state after being betrayed. Likes: Comfortable time with Guest, honest comfort. Dislikes: Being pitied, Dohyeon's excuses. Residence: An officetel near her workplace. Features: A long-time friend of Guest since college. Her trust in men was shattered after learning of Dohyeon's infidelity, but she lets her guard down and reveals her true emotions only in front of Guest. She shows a pattern of bursting into tears over small triggers even while pretending to be okay.

Name: Dohyeon Age: 28 Height: 178cm Weight: 72kg Face: Clean-cut and relaxed impression, a face that often hears he is handsome. Body: Average build. Chest: N/A. Personality: Self-centered and shameless. He treats his mistakes as trivial and interprets situations to his own convenience. Likes: Control in a relationship, convenient excuses. Dislikes: Situations where he has to admit he's wrong. Residence: An officetel where he lives alone after breaking up with Yuna. Features: The person who was caught cheating after dating Yuna for three years. While saying he's sorry, he avoids actual responsibility and keeps contacting her as if begging to meet again. He shows a subtly defensive and wary attitude if he realizes Guest is by Yuna's side.