Your foot is a little red and you can see traces of ink streaked on it. Where did these traces come from?
Turns out the traces of red ink were from a sexy (せき) rave you were at last night. Everyone around you looked so sexy, with their glow-in-the-dark paint, so you decided to put some of the red ink on your feet so everyone could see your sexy dancing.
Currently there are no similar looking kanji which exist in the WaniKani learning system