Exhausted

It's entitled like that cuz I did this work earlier afternoon. I only had 2 hours of sleep, and had to go to school early. T'was really exhausting due to the lack of sleep. I got drowsy the entire day at school, but funny about this was when I was doing this artwork, I was told that I had a serious face on the whole time. Hehe, guess enjoyed painting him too much. 
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I'm no pro yet when it comes to human sketches/painting, etc. But I'm willing to learn cuz I really like doing them There's always room for improvement after all.