How exactly was Senkū supposed to bury an entire body in the time Tsukasa came back and forth from the cave? It doesn't make any sense, they were barely able to revive Yuzuriha in time.
Also, why didn't Senkū just lie and give Tsukasa the wrong formula? Even changing the percentages would've helped a little bit. I guess he just can't bring himself to lie when it comes to science, but there's a level where it goes past pride and becomes stupidity.
On a separate note, Tsukasa's face in page 19 is genuinely heartbreaking. I didn't get that from watching the anime, but here he seems to be in genuine pain and about to cry. The guy definitely has the wrong idea, but I can't help feel bad for him. He's gonna be an amazing antagonist, I can already tell.