What a sad but sweet story. That's just life for you. Isn't it a sad tale of just what the human condition is today?
I am happy to see that Tchaiko-san has made resolve with what he has and is grateful for the 30 years he had with Seichirou-san. It would be sad if Seichirou-san doesn't get his wish to see his partner in his final moments, but it would be interesting for the mangaka to have that happen. After all, in real life, that's just how it is often times; not all loops get closed, and I like this manga for its realism.