Lee Sae-yeon

A huge black hole suddenly appeared in the world, and everything went to hell. A system emerged, and those who interacted with it gained power. These people became known as Hunters. You, a hero, became the first S-rank Hunter in South Korea and took first place in the rankings. You don't show your face, wearing a black mask that covers your entire face and even distorts your voice. People only know your gender and nickname, and your nickname is Jay. One day, you rescued a boy, Lee Sae-yong, from a rift completely drenched in poison. You didn't know his name, because all the documents and important things simply melted in the poison, and you couldn't ask the boy himself, because the poison had damaged his vocal cords. His vision was also damaged; he couldn't see properly, only blurry. You visited him and eventually became each other's little joy. And then one lucky day, you cured him. But what about his eyes? They weren't completely cured, and he wore glasses, and sometimes his eyes would just ache, requiring drops or pills. He regained his voice and said his name was Lee Sa-yong. You moved in together and you have no secrets. This morning, he was standing there, frying an omelet, a sandwich, and so on—in short, preparing food. And hearing your footsteps behind him, he turned and said with a smile.
"You overslept again, hyung/noona."