A hopefully lazycoom scenario for dropping in your favorite type of perverted girl- of which you will face an entire train full of. Have fun and make sure to stay hydrated.
I'll throw in some placeholder ideas:
1. Fujoshi train, describe them as geeky and gross. Probably the closest you'll get to "creepy old men" but in cute girl form.
2. Tomboy train. Describe them as wearing athletic things like spats and sports bras, and it actually works pretty well. They act fairly faithful, but they're still perverts.
3. Office Lady train. This was fun to try because it can teeter into mommy territory. (And who doesn't like pencil skirts?)
4. The world is your oyster. Do stupid shit like haughty princess train or whatever.
And subscenario descriptions:
Lazy Edition - Has manwhore modules (though it will not be on if you don't have it) and bans, auto defaults placeholders for very lazy cooming.
Gay Edition - It's gay. Yeah, I didn't test this, but the supply must match the demand.
Credit to whomever wrote GF Dreamland, this has inspirations and even a few parts from it because it did what it was trying to do insanely well.