[Sousei's grip doesn't loosen, either, but his expression does grow a little confused. Tenka doesn't want to die... but that's all he's done this entire time. Worked alone, dragged himself into corners and found himself in a hole he couldn't dig himself out of.

If he didn't want to die, then...]

Why? Why didn't you tell us?

[Why didn't Tenka tell him? It didn't have to be this way. He didn't have to face everything alone.]

You took on everything alone, and ended up leaving behind the only people that mattered to you, after everything. [For the record, he means Tenka's siblings--after all, Tenka had left the Yamainu in order to take care of Soramaru and Chuutarou.]