It honestly would've been a better ending if it went the predictable way, which is Higuchi having end up performing Tenju's surgery and overcoming his fear and they build each other's trust and love from then on. I would be lying if I say I'm satisfied with the ending, buttt as long as they're happy I'm fine with it I guess
I honestly think that this ending was perfect. Higuchi changing his profession from heart surgeon to emergency medicine was a sign of growth to me. Him moving on from his past/mistakes and taking on a different route seems a lot more realistic than him suddenly having to perform a heart surgery on his lover and saving his life - considering he seems to still be dealing and coping with his past failure.
i'm gonna go feral the chapters are so shorttt ㅠㅠ but it's a good thing that it's not slow paced, otherwise it would take about at least a year to get the climax..