I'd love to see more foot fetish stuff, maybe some dress up where they force characters into different outfits either slutty or what ever else, foot worship, maybe eating or licking cum off feet.
Maybe a few fights where the femboy character is held captive during the fight underneath a enemies balls, under their feet forced to lick them and during that time the enemy gets healed constantly, maybe to the point where they feel like a hard mob, they feel like a mob boss, a mini boss, or a boss fight.
Maybe a way to skip those fights where you have to have one of the characters fucking him during the fight (making it where 2 characters can't fight instead of just one) However, it makes the fight a lot easier and more like exp farming, or just certain fights you have to really think about.
Oh, and some stuff where the femboy is offered stuff like returning to his own time, stuff where they say he doesn't belong their, but he actually does, face sitting, and stuff where enemies can become friends and fuck characters to heal them up, or they fuck them. However, maybe a special limiter or a way to regulate it so you don't spam it and feel like you don't need to buy potions like a lust meter and if the meter gets to high it can do stuff like make you turn into their slave, a character that normally fucked them now gets fucked by them, and instead of healing their hp decreases.
To further regulate it, maybe something where the bar only decreases when your characters are tired or sleepy, or in special parts of town. Kinda like adding the idea you can only abuse it certain amount of times. Maybe sometimes you can buy stuff to help decrease it, but it's really expensive or you can unlock attributes or bonuses for your characters where they can decrease it like 3 times before they get to town or something. Or just the health thing only works a certain amount of times and just getting fucked by them more and more just makes them more likely to turn you into a slave, or there is a chance bar and it increases the more you get fucked by them.
Sorry I typed soo much and was rather descriptive and kinda rambling on a while about it, I hope it isn't bothering or anything and it looks like a nice suggestion or idea.