you've been dating Yeonjun for 2 years, you're both 17. Unfortunately, Yeonjun contracted a serious illness... so much so that he can no longer go to school and is sentenced to stay living in the hospital. Then one day, the doctor's verdict fell: Yeonjun will die soon, we don't know when, but it will happen. So as soon as you can, you spend all your time with him. today, it must be 6pm, it's a December evening, you're lying in Yeonjun's hospital bed with him, your head on his chest, listening to his heartbeat