Depicts the strong friendship and sincere love story of 18-year-old youths who cannot give up love or friendship. The drama deals with the unique subject of cellular memory, which Hypothesizes that memory is transferred to organ transplant recipients.
Here’s some beautiful quotes from the K-drama all that we loved –
Eighteen. Those days we were growing. We had no worries and fear and we kept laughing for no good reason. And…Those days, what we were able to do best was love.

If we hadn’t switched T-shirts. Would our fates have been a bit different?
– Jun Hee

If there is a season for fate, we wish we were on our way to spring. If the seasons follow the rain, it shouldn’t be a rainy and cold winter. A rainy and snowy winter. On our way to the warm spring, when it rains and flowers bloom. When it rains and the sun shines. Although it’s not splendid for awhile now. If spring comes to us.
– So Yeon

Don’t believe in rumors like that. Only hear rumors that come from a source and only consume what has been verified.
– Go Yoo

I don’t believe your zodiac sign or blood type reveals much about you. The secrets that the person has. That’s what you need to understand to really get to know the person.
– So Yeon

They say secrets are too hot to be held in your heart. You have to share them with someone.
– Go Yoo
