Maybe I'm looking into this WAY too much, but this almost reminds me of school and the people I hung around. With me being the purple haired guy on the left (sorry, not familiar with this source ). I just see this and have a flashback, but in a good, funny way.
Ah yes, I watched a friend of mine live streaming, and notice that just after he had drawn a line, it smoothed out all the little bumps! Useful! I will most likely find myself a copy when I get a new computer (which at this rate is going to be never T_T).