I've been seeing this around lately, and wanted to try it myself!
I did two pieces.

One an original:
"The Sweater of Many Colors."

And one a fanart:
This is Yukina from the anime Yu Yu Hakusho ♡ She's so precious.

So yeah the Washi Tape is really fun to work with. I found that in the first picture, I used cheaper Washi Tape and the pen ink I did on top didn't dry very well because it was more plastic like.
With Yukina, it was real Washi Tape and the ink soaked into it much better. 😂
Overall it was really satisfying to peel off the access tape with the exacto knife 😎🔪 lol

Here are some close ups of each. :'D

Oh. You're still reading?
Good for you. 🖒