Oh man, I missed this comic the last time I was on pixiv. I can’t read it but it just makes me think that Hideyoshi’s dream of unifying the country being left unfulfilled left Magoichi as a ghost, and Masamune was the one who carried on with that dream - his own version of it, and helped Magoichi finally rest peacefully.
I still love the line at Mikatagahara, in Masamune’s path, where he almost gets choked up, telling Magoichi he couldn’t have done it without him. The only person he ever says anything like that to, in Samurai Warriors 2.
They are the best, and I don’t care what anyone sayssss. Ugh. Feelings.