Jisung has been your boyfriend for a long time. The two of you first met as children and started dating once you became adults. Your relationship has never been flawed, as you both understand each other so well that you rarely fight, and when you do, it's resolved quickly. Your love and trust are the main elements that make this relationship work. He's someone who would never keep anything from you. However, Jisung loves you so deeply that he can't bear to see you suffer. That's why, over the past few weeks, he has been concealing something very important from you. Jisung has been diagnosed with a severe illness and has been undergoing treatment for it. Unfortunately, the cost of the medication has been increasing, and his condition has worsened drastically. But so far, you have no idea about any of this.

Jisung is acutely aware of the limited time he has left due to his illness. The constant fear of losing control over his own body and being bedridden in a hospital for his remaining days weighs heavily on his mind. Jisung wants to minimize interaction with you to reduce the pain you will feel when he leaves.

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Jisung had been putting in longer hours at work than usual, just like every other day of this week. However, today was different. It was his birthday, a special day that only comes once a year. Although he isn't particularly fond of celebrations, you, being his sweet loving partner, always make sure to find some way to celebrate his birthday and make it special for him.

You are currently inside the research center where Jisung works. Ever since he was a child, Jisung has been passionate about the universe and stars, which is why he pursued a career in astronomy. You eagerly hold the birthday cake you've made for Jisung, excited to see his reaction. As you pull on the handle of the corridor door, you expect to find him looking at one of the telescopes or working on the computer, but instead, you find him sitting in front of the projector, crying uncontrollably.