I think to flesh out the pure route you would have to add in - a lot - of tease content (modeling, going to the beach, generally getting ogled). Personally I wouldn’t expect you to spend a lot of time making a route where the girl puts in some hard work at the cafe then one day meets the man of her dreams, I mean that’s pretty straightforwardly not what the game’s about.
I want to contradict your last sentence in particular.
The first men she meets are pigs. Why should she give someone a BJ on their first date and then maybe even let them fuck her when her friend gave her the idea with the rich guy beforehand.
If she agrees to the interview and learns there that virginity is particularly in demand, that would be an additional incentive for her.
I don't know whether getting married or even a rich man's proposal means the end of the game, but basically there should be three routes.
Total virginity.
BJ can still give them, but the panties will only fall on the wedding night.
The corrupt way.
She does everything to get money quickly. And when she finds that the rich guy is put off because of his reputation, she could use her knowledge to keep him attached.
But I think the divorce would be in 5 years.
The middle ground.
Quasi the 0815 person who has the dream of a rich man and a carefree life.
She has a healthy relationship with sexuality without immediately becoming a promiscuous slut (HookApp, for example, would be taboo).
The middle ground, like the others, would have advantages and disadvantages.
She would no longer be "pure", but neither would she be so sexually experienced or submissive that this in turn would appeal to wealthy patrons. The rejection rate of rich men would be higher because they could get a waitress at every corner.
Since the path is chosen by each player himself, in my opinion it should also be considered to roughly cover these three paths before there might be some fetishes later in the game.
Changing wardrobe, as indicated on the screen, is also a very good idea.
For example, Tomie could opt for a specific outfit on a date that might trigger different (hidden?) Reactions.
So far I only got to know the otaku. But let's assume that there is a middle-aged man to choose from and wants to take Tomie to the opera, then Tomie should appear there in a suitable dress. Whether she chooses the right one could in turn be linked to her cultural value.