I will have to rewatch previous episode to write them all down, but in today's ep (5th) one line especially hit hard:

✒️ "I know your heart's in the right place, but stop apologizing so much. If you want to do what you always wanted, you'll have to learn how to deal with feelings like that."

I'd have to rewatch to find others, but what I remember off the top of my head ...

Daeum: One week is more than enough time to fall in love.
Jeha: One week is also more than enough time to ruin love.

--Episode 5

“Real life was always out there, beyond the hospital. The outside world turned out to be tougher than I thought. But I don’t want to give up.” – Lee Daeum, episodes 5-6

“I’m not someone who exists to act the way you want or predict. That’s something you should expect from someone who loves you.” – Lee Jeha, Episodes 5-6

“The world isn’t all hearts and roses. Some people chase the fantasy of love, only to get stabbed in the back and end up completely alone.” – Lee Jeha, Episode 04

“That was the moment I realized, maybe I can be the star of my own story, as long as I cast Lee Jeha into my life.” – Lee Daeum, Episode 02

Episodes 7-8

“Something is stirring in me. But I don’t know if I can call that love. Or if I’m even someone worthy of it.” – Lee Jeha / Yu Eunae

“I’m terminally ill. This isn’t acting, it’s not for show. I’m actually a dying terminal patient.” – Lee Daeum

“How could you even think to fall in love when you’re dying?” – Chae Seoyoung 

“I’m sick and tired of being the only one stuck in place.” – Lee Jeha

“If I can just finish this movie, I don’t care if I never get another chance or if people think I’m inhumane. None of that really matters anymore.” – Lee Jeha

“Can someone like you give everything up and love someone? Even knowing it’s going to end?” – Chae Seoyoung 

“Thank you for keeping me alive today.” – Lee Daeum

“So how do you tell what is or isn’t love?” – Lee Jeha

“Real love is rare these days, you hardly see it. Make one wrong call and your whole life is ruined.” – 

“If you build a wall around your heart, love can try to knock it down and you still won’t recognize it. It’s sad but happens all the time.” – Cinematographer

“It’s just immature to pour your heart out to anything that feels like love. When it’s blurry, you need to use good judgment.” – 

“Most of the time, if you’re wondering whether it’s love or not, chances are it’s already begun.” – Cinematographer 

“Every night, I beg to live. And when I wake up, I think, ‘Wow, I got one more day’, ‘Wait, no’, ‘Maybe today’s the last’.” – Lee Daeum

“I want to hear the waves, look at the stars, and see your face, too.” – Lee Daeum

“My own mess ended up hurting you.” – Lee Jeha

“Is there really no way she can survive?” – Lee Jeha

“She’s in a lot of pain but putting on a brave face. She always smiles the brightest when she’s hurting the most. So when she smiles, that’s when you should worry.” – Dr. Lee

“It’s beautiful when you smile.” – Lee Daeum

“It’s allium. Endless sorrow. It’s a symbol for endless sorrow. It’s endlessly sad to not have someone you love by your side. No one really knows where that sorrow ends. But if I have to live with it forever, I guess I’ll have to love this sorrow that’s deep in my heart.” – Lee Daeum

“My eyes are always on you but yours are always on someone else. And that person’s eyes are always on you, too.” – Jeong Eunho

“I want to run until my heart bursts too. So that’s what it felt like. I’d forgotten that.” – Lee Daeum

“I keel forgetting things when I’m with you. You’re sick, but I don’t see that. There’s no time but if feels like there is. I like you, but I feel like I shouldn’t. I thought I was mistaken but I know all too well that it’s real.” – Lee Jeha