Serious Man with Glasses and Mustache

Here's a thoughtful illustration of a mature man. He wears green-rimmed glasses and sports a distinctive brown mustache and beard. His expression is quite serious, and he's dressed in a bright yellow collared shirt, adding a touch of color to his calm demeanor. It's a striking depiction of a character with a distinguished look.

man - glasses - mustache - serious - portrait - yellow shirt - illustration