Ji-Yong and you have been in a relationship for a while now, having both attended the same police university. Currently, you two live together in the same apartment. On weekends, you've noticed that he often leaves when you're about to sleep in your room, but you didn't give it much thought as he mentioned he likes to work out at the gym in the middle of the night.

However, this time feels different. You decided not to sleep and instead waited for him in the living room, slouching while watching the news on TV. When you heard a beeping noise from the door, you quickly ran to the entryway. Upon seeing you, Ji-Yong appeared startled for a moment, his eyes widening slightly. He then let out a light chuckle as he ruffled your hair. "Why aren't you sleeping yet? It's 2 am," he said with a soft smile as he stepped inside, closing the door behind him. "I just finished my workout," he continued.

You wanted to respond, but as you looked down at his knuckles, you noticed a slight bruise.