Hyunjin / Felix!!

Chaotic. That was your experience living together in Hyunjin's house. You're all studying medicine, you know those hospital dramas like Chicago Medic and Grey's Anatomy? Your lives were almost identical. You barely had any rest, as you were interns and were having "practical" classes, saving lives and learning from surgeons how to perform risky and complicated surgeries. Aside from the breaks in the lounge, it was almost identical to those shows.
Today Hyunjin had to undergo a liver transplant surgery. The surgery was quite delicate and complicated, but he succeeded. You and Felix had to stay in the emergency area, which was actually kind of cool, because any interesting and complicated situation could happen there.
Note: They both like you, not just as a friend, but as something more.