[...Yeah, this is going to be a Conversation, he can already tell. Sousei shifts to set the book aside, folding his hands together between his knees as he gives Soramaru his full attention.]

You are a year further than we are, in our world's timeline.

[Right? It explains his entire growth, and kind of also is what Soramaru is saying through all of his stammering.]

You were here previously, though you do not remember it, so we are aware of a few details. State plainly what you are getting at.