This is heartbreaking. I mean death's inevitable, really. I guess even Mamiya's genius cant exempt him from it. He did try and succeeded, kind of. But yeah, sometimes things just... don 't work out. Well, I hope in another universe they would met under happier circumstances and be together longer.
Anyway, thank you so much for the great translation! I always lurk in your discord server to find great BL, so looking forward to your next projects! Oh, and ofc will be patiently waiting for the extras.