tattoo that changes in real-time, magical glowing tattoo,
"used" counter on thigh increasing,
"please insert here" arrow tattoo above pussy,
QR code tattoo linking to voice message of moans,
body writing that appears when aroused,
invisible ink under UV light revealing slutty secrets,
calligraphy brush tickling while writing on skin,
kanji for "shame" written with cum on forehead,
traditional japanese writing aesthetic, ink wash painting style