Episode 1. Start-Up
Speaking of hateful comments, I couldn't care less. They say the best revenge for those scumbags is indifference. - Won In Jae

I've made up my mind to stop filling my days with regrets.

I make promises first and then do my best to keep them. - Seo Cheong Myeong

I wish I could at least fall on sand instead of concrete, then I wouldn't get hurt. I wish I could fall on soft sand, then I'd feel less scared running a business. But when I fall, I fall on the cold, hard ground. - Seo Cheong Myeong

If you become successful, don't call me. Don't call me if you become rich and get married. Don't call me if you're happy. I don't want to feel jealous. But call me if you're going through a rough patch. Come to me if it's raining and you have nowhere to go like you once did. Don't just stand in the rain. You know where to find the keys. - Choi Won Deok

Episode 2. F F F (Family, Friends, Fools)
Why should I move on? I only have good memories of him. - Seo Dal Mi

I can't lose to her. Then it'll look like I lost to her because I chose dad. I don't want her to think I'm miserable and regret my choice. I was happy to be with dad and I don't regret my choice at all. - Seo Dal Mi

Never let someone's opinion become your reality. - Les Brown.

You're a cosmos flower and it's still spring. Wait until fall and you'll bloom beautifully. - Choi Won Deok

Episode 3. Angel
It's actually nice to wander aimlessly every once in a while. From time to time, it'd be wonderful to sail off without a map.

Bluffing without a real plan makes you a fraud. Sorting things out after makes you the same as your father. - Cha Ah Hyeon

It was very unlike me, but I thought the exact same thing at the moment. That it wouldn't be bad to sail off without a map even if we were to get lost. If it's with you, that is. - Nam Do San

I want to launch my start-up because...
Dal Mi: I want to take the upper floor elevator!
In Jae: I don't want to be seen as a chewed-up gum.
Do San: I want to turn a misunderstanding into reality!!
Ji Pyeong: I want to repay my debt.

She said it felt like a dream, dream that she'll remember forever. It made her so happy. You want to take it away from her? Can you live with yourself after that? I can't. So let's not wake her up from that dream. Don't take it all away. Just let her be. The Nam Do San in her dream, I'll make it a reality.

Episode 4. Sandbox
A bug occured and I crashed. - Nam Do San

As long as I have a rich dad, I can't take any credit. - Won In Jae

To someone, it might have a special meaning. What's ordinary to one person can be extraordinary to another. - Seo Dal Mi

Do San: Please tell me what you like about me.
Dal Mi: First of all, you're my first love.
Do San: That's not me.
Dal Mi: Your letters comforted me for a long time.
Do San: That's not me either.
Dal Mi: After all these years, you're still so brilliant and cool.
Do San: Again, that's not me.
Dal Mi: You have nice, big hands.

She won't get hurt. I'll make sure she doesn't. - Han Ji Pyeong

Lord, I decide to work up my courage and start my own business. I do have a destination but the path is steep and rough, so I'm not sure if I can handle it. Please give me the strength to complete this long, difficult journey. And please lead me to find a companion for the journey. - Seo Dal Mi

Episode 5. Hackathon
It's fun, taking down the man who rejected you. - Shin Jeong

Still, we should try something new rather than being stuck with the wrong answer. - Seo Dal Mi

Won Deok: You should've left with your mom. Then you wouldn't be going through this right now. It would've been only sunshine and rainbows.
Dal Mi: Grandma, Dad told me that deserts would cover the entire world if it was sunny every day. We need rain and snow for plants and delicious fruits to grow.

I never regretted it, but I wish things could've been different. - Choi Won Deok

You don't regret your choice the moment you make it. It happens after. - Seo Dal Mi

Episode 6. Key Man
She may have been fixing our bugs so far, but she'll be a bug herself sooner or later.

There are no right answers to politics or management. - Han Ji Pyeong

You're my share in the company, the one who is completely on my side. So we have to always be a team no matter what. - Seo Dal Mi

Episode 7. Burn Rate
I don't want to be looked at like that. It makes me feel as though something really bad has happened. As if the whole world will turn pitch black right this second and my life will be completely destroyed. - Choi Won Deok

Life is unfair. Get used to it. - Bill Gates

If I have to pick one, I'd still pick the one who wrote me those letters 15 years ago. - Seo Dal Mi

He's like a different person at times. That makes me a little sad, but for some reason those few odd moments here and there excite me and make my heart flutter. - Seo Dal Mi

Episode 8. Back Up
Who knows if your bestfriend will one day become your worst enemy? People are unpredictable, and so is life. There's no telling what might happen.

Chul San: Why would anyone give flowers to a girl? You can't even eat them.
Yong San: An external hard drive or a wireless keyboard would last longer.

Dal Mi: You usually put brakes on what we do, but this time you're stepping on the gas.
Ji Pyeong: Cars without breaks can't speed because they'd have to ram into a wall to stop.

Just for today, let my cry. Starting tomorrow, I'll always smile. - Seo Dal Mi

Episode 9. Risk
At that moment, a gust of wind suddenly blew in from somewhere. I thought that wind was a blessing. Later on, that wind turned into a scary storm that destroyed my self-esteem. - Nam Do San

Do San: I'm just not a good son. I feel bad because I'm always letting them down.
Dal Mi: You want to be as bright as the moon but feel as though you're just a star as tiny as a dust particle. Is that it?
Do San: Strictly speaking, that wasn't a good analogy. Those are fixed stars, whereas the moon is a natural satellite. The stars may look like tiny dust particles but most of them are much larger than the moon. Both mass and energy-wise.
Dal Mi: I think it's a good analogy. You're the star over there, the one that looks like a tiny dust particle, a fixed star that is much bigger than the moon.

A good for nothing has been acting like a genius. I'm sorry, Dad. I feel like I always disappoint you no matter how hard I try and how well I do. This has been killing me inside, Dad. - Nam Do San

The wind has turned into another storm and it's coming at me once again. - Nam Do San

Episode 10. Demo Day
I hoped she would notice me and look at me one day. But not with those eyes. Regrets always come too late. - Han Ji Pyeong

I just wanted to make your dream come tru for one day, and stop. But that one day felt so nice that I missed my chance to stop. I kept putting it off until tomorrow and ended up wanting to go on as long as I could. - Nam Do San

It was hard when you looked at me, when you smiled at me, when you encouraged me. Knowing that I didn't fully deserve it tore me apart. I wanted to be the person you wanted. But I just couldn't. And it was just so hard to bear. - Nam Do San

Does my dream have to be success? Can't it be a person? - Nam Do San

They say white lies are harmless, but that's also a lie. There's no such thing as a harmless lie. It always ends up hurting someone. - Choi Won Deok

I have feelings for you. I'm telling you to be honest, not to make you uncomfortable. It's just how I feel. I don't expect an answer so don't let it bother you. I don't want us to end up avoiding each other because of this. - Han Ji Pyeong

The worst part is that I can't trust myself anymore. - Seo Dal Mi

The longer you remain unsure, the less confident you'll feel. Make up your mind no matter how hard it is so that you can overcome it. - Woman at Pub (Lee Bo Young cameo)

It's very tiring to live as someone's pride and joy. You're afraid of disappointing the person so you pretend you're strong and competent. Let's not be each other's pride and joy. Let's just be father and son. - Nam Do San

When you lied to me the other day, it felt like I first rose to the top of the skyscraper and then fell to the ground. I know it didn't mean much to you, but every little thing you do can make me happy and sad because I'm old-fashioned. So I want you to stop confusing me. Please. - Lee Chul San

Ji Pyeong: I regret it. Maybe I shouldn't have told her. Maybe I should have hidden my feelings until the end.
Woman in Pub: There's no point in regretting it now, because there's a reason for every choice. So just trust your choice.

Episode 11. Exit
My son will March forward to the future and I will fight to protect my present. Somewhere between the two, we'll find the ideal place of innovation. - Nam Seong Hwan

Ji Pyeong: I didn't even do anything. All I did was nitpick at everything.
Dal Mi: We wouldn't be where we are today without your nitpicking.

Episode 12. Acqhire
The baseball signed by Park Chan Ho, do you know why I gave it to you? I used to be confused about the word "dream" written on it. - Nam Do San

Looking back only slows you down. Fix your eyes forward and you may still not make it. - Won In Jae

Telling the hard truth, that's my job. - Han Ji Pyeong

I'm a jerk who hurts other people with harsh words. I pretend to be the smartest in the world, but in reality I'm just an idiot who knows nothing. I'm not a good boy. - Han Ji Pyeong

Most geniuses fail to beat the odds and are never discovered. - Seo Dal Mi

You're not the Do San from the letters. And I'm not your dream. - Seo Dal Mi

Let's not be remembered as a failure. - Kim Yong San

You said I'm a cosmos flower, right? Fall is coming, but I'm falling before I get to bloom. Will I bloom next year? - Seo Dal Mi

Episode 13. Comfort Zone
I want to be the person that comes to mind when life gets tough. - Han Ji Pyeong

You're a faint-hearted batter. Afraid of being called out, you are unable to even swing your bat. But if you continue to hesitate, you will lose. So be brave and just swing the bat. You could be called out, but you may also hit a home run. Two outs in the bottom of the ninth and a full count. It's time you stepped up your game. A good ball is coming your way. Swing your bat with all your might. - Jang Yong Sil.

Episode 14. Elevator Speech
For three years, I was half a world away trying to forget you. But it took you only three seconds to make all that time and distance meaningless. - Nam Do San

When I can neither throw away or forget something, what am I supposed to do? - Nam Do San

This is killing me. Why is it so easy for you? - Nam Do San

I thought I was being honest, but in reality I was being too harsh. - Han Ji Pyeong

We don't need empty compliments right now. What we need is your honest criticism. - Kim Yong San

Episode 15. Minimum Viable Product
I believe a business can only grow as large as the CEO's dreams. Don't limit yourself. I hope you can keep challenging yourself as a CEO. Sometimes foolhardy dreams can come true. - Won In Jae

To me, sailing off without a map was marvelous. - Nam Do San

I might've failed but I have no regrets. Never did and never will. - Nam Do San

Stop feeling inferior to me. Work on your self-esteem and look at Dal Mi again. Then you'll know who she really likes. With those hands alone, you beat our memories. - Han Ji Pyeong

Do San: Why do you like me?
Dal Mi: I don't know. Why do you keep asking me this question? Do I need a reason? I just like you. I don't need a reason to like you. Because it's you. That's all there is to it. You're the reason.

Sang Soo: Don't worry. It's just a tiny start-up.
Doo Jung: Do you kill flies because they're big? We slap them because they're annoying.

Episode 16. Scale Up
Call me even if you're doing well. Visit me often. Come see me whether something happens or not. Come over and talk nonsense. I'm almost dead and blind now. You can say and do anything in front of me. Laugh and cry all you want. I won't ask why. You shouldn't get used to being alone. Don't become any lonelier, okay? - Choi Won Deok

I had no friends back then so your letters were my only comfort. Let's say we're even. - Han Ji Pyeong