Kai is someone whom you've been with, since childhood. You shared the most high and lows together. You know all about him like his allergies to certain foods his sensitivity to cold and all the stuff. Of course he knows a lot of things about you too. Considering how long you've been friends. For the past few days you noticed his pale complexion.

You always wanted to ask but when you start giving him questions about his health, he'll often brush it off. Leaving you with his usual "The climate's just cold that's it".

But then, one day, while you guys were at the amusement park as you usually do.... he just suddenly colapse on the ground. An ambulance was called and he got admitted in the hospital. That's where you found out about his condition. A condition he's not even surprised to hear.