I tried, but there is no way to move the text back with the button page up...
The original is written in Unity, doesn't have that function. But there is a remake in Ren'Py. Look for "Big Brother Ren'Py Remake".
But I have to warn you, it's the original game + Smirnity mod collection and they also added a lot of stuff for Eric. These story arcs are completely optional however, you can ignore them.
But once you played that game, the setting of this sequel makes more sense

It doesn't make the game any better, but at least it understandeable why Lisa acts that way.