I’ve seen it used very well in stories, and what you’re describing sounds interesting, but tread lightly is all I can say.
Yes you can draw rape as part of the plot if you have to.
It’s not a easy subject for most people, so you might wanna put up a warning that the next pages of your story may include rape scenes. It depends on what kind of comic you’re drawing. A comic that’s usually funny would not look good with rape scenes. Example 1: You have a funny comic about three guys and a girl, and the comic is about them hanging out and doing stuff, but then you make one where they’re at a party and they’re all drunk, and the girl is a lot drunker, and one guy helps her to the bedroom for her to get some rest and walks away. The two guys that are left looks at each other with a smile and says “The party is just getting started!” and the panel shows them about to open the door. That’s not funny, you know what’s gonna happen. If they’re all friends, why would they do that? It wouldn’t fit in with the comic.
Rape jokes are NOT ok. And No, they CAN’T “be funny sometimes.”
Example 2: Your character is a badass hero who lives in a bad city where crime happens every day, and as he’s walking down the road, he spots a gang of men who’s struggling to hold down a girl who they’re gonna have their way with, and he breaks out his guns and shoot them. That’s your typical hero who saves the day, and you know he’s a good guy, he’s suppose to be the hero who fights crime,and thus he probably meets a lot of rapists and murderers. BUT overdoing it isn’t good either and it kills the comic if it happens several times in one story.
Example 3: You could also make the “hero” a unlikable asshole who not only joins in on the gangbang, but also kills them, including the girl, but what would be the point? Is he on his way to work? Is he a assassin or gangster? A demon from Hell maybe? Or maybe you just like writing asshole characters for the sake of it, but without any other plots/direction for the comic to follow, it would be pointless.
But if it’s more of a fetish thing for you, then be prepared for some harsh criticism from people who doesn’t share your “interest”.