This was on SNS around 10pm KST on 2/15/15:

Credit: jinwooky

The person seems to be the illustrator of this drawing. Above in black lettering, it says,”Lee Seung Gi, a daily big help, together with the magazine of hope, Big Issue“

Next to her illustration were her comments:

“It’s an honor to be participating in a good cause🙏
Next Monday, they say that Lee Seung Gi will be selling Big Issue together with its vendors – !!
This drawing can be used as a banner/sign and placard  😃
Handwriting was done together with @vintagegirl_yj  – 🙌🙌🙌”

I checked dclsg and there was a post about it asking exactly when was “Next Monday” and where the location was. If it were today, she would have said “this coming Monday” or “tomorrow”. However, “next Monday” usually makes one think of the following week, especially when written so late on a Sunday night. One dclsg member even questioned the validity of this event.  I’ve searched Big Issue’s twitter and facebook accounts but couldn’t find any further details about this event so far and it’s a little past 8am KST on Monday morning. How nice it would be to run into Seung Gi on my way to/from work! Updates to be posted.

Korean to English translation by Elise, Lee Seung Gi Forever