Bored.

Yup.
There's a weird "Sigma - D - U" sign in the bottom right corner.
I was actually (re) reading some chapters of I don't want this kind of hero (no, I'm not obsessed with that comic) and there was that ho-ong-ee thing that made me wonder what my sign looked like from the side.
So I tried and I got nothing.
Except for a weird "H" "Sigma" "D" "mathematical symbol 'for all' " "underbar".
So that's the boring story behind that weird sign.

Media used:
Paint tool sai. Tablet.
And that's all.
It's been a long time since I last did something on PTS from scratch.