Love this flashback chapter, especially the visualization of Teshima-sensei's process. That's how I feel when I learn in drawing.
Also love the throwback to Love Roma.
Also really liked Toyoda's storytelling which takes great pains to show that while Hebichika is pretty thoughtless about how her last-minute demands for changes on a whim affect her assistants and Teshima's opinion of her has soured, Teshima still learned a lot from the opportunity, both directly (drawing lines for screentones, advice on tones for different objects) and indirectly (that she needs to get glasses so she can properly see things like perspective and color).