Shinji stares fixedly at something. Touji peers at him reproachfully.
Toji:“Hey, boss”
Shinji:“!?”
Reichu: Toji's actually saying “sensei” (or, rather, his clipped Kansai version, sense). Now, I'm not quite sure what this implies when used among buddies, but here it's been translated as both “big shot” and “chief”.