Of the cuff, I would imagine it's a false-memory sort of thing, the player's input tends to be minimal and ignored while True History plays out regardless. We can imagine a sort of "In this moment, Sensei was too weak-willed to face the honest truth of what he did, so he blacked it out." We of course can conceptualize the ren'py choices as being representations of the player speaking/influencing the world.
But mainly I thought it was funny to describe famed, critically acclaimed event Ad Infinitum (TM) as 'a weird walk home.' That's pretty funny. No shade of course, it's a completely true description.