The "Gyaru Maker" runs on points, and now those points are down to zero because the god's meddling. So no further customisation until Jun recovers them.... okay, but what's going to be the excuse going forward for not having more modest breasts/a body more to Jun's liking? This was just a one chapter gag; but the power is clearly established now, so ...
I think it's because she's a god. She doesn't understand because her divinity averts her from consequence so she plays with his body like it's a rubics cube. She's definitely a sick fuck, and she probably will never change because she represents gyaruness, I doubt Jun has any recourse but to accept her whims. Her character makes a lot of senseOk, I liked the gyaru god, but this bitch is starting to annoy me. Got to throw her at a wall a couple of times, and maybe she'll finally learn her place. Junpei being a gyaru was all her fault despite him not wanting to, and when he finally had the chance to feel more like himself, this little shit reversed it just because of her fetishes. Screw her. It's just a manga, but if you had seen in the news that someone performed reassignment surgery on another person against their will, you'd probably think, "What a sick fuck," right?