Dude you really have to appreciate the shortcuts hentai artists use when drawing their female characters. We want to draw a scene where the female lead takes her clothes to get dicked down by godzilla's purple pulsating tentacles, but actually drawing clothes and frames for them being removed is a pain in the ass, so why don't we instead draw the nude layer and just colour over it with colours that look like clothes. The boobs will look fuckin weird as shit and pressed up against the cloth, but we'll just chalk that up to fanservice, and make sure to have the shirts come off screent cause budget.
