Subtle details, but, the first chapter emphasized on the maturity this girl portrays, then, this second chapter REALLY put the focus on the age difference and real maturity of them both.
Like, details like not really showing too much about the age difference, height difference and even overall behavior of the characters on the first chapter but, then, showing the real difference in age using the body size, using their ways of communicating, the way they act towards each other and think about each other, and, even showing how calculating she is to demonstrate how she actually does know exactly what she's doing...
I'm impressed, this manga is amazing so far, I hope to see more of this in the next chapters as I continue reading! (ChatGPT ahh text)