I've commented before on individual manga that the most powerful and wonderful thing in the world, the fetish to which all others pale in comparison, is when a cute, non-slutty girl honestly wants sex, and she wants it from you. It's at once the single most vanilla thing imaginable, and yet the most amazing. However, it's a surprisingly rare thing to actually find anything that fits the description.
There are a few specific qualifiers to the concept, and most of the content anywhere fails to meet one or more of them. First, she has to be the one asking for it, showing at least a little assertiveness; this is the most failed of the criteria, where most hentai has the guy asking/pressuring her, not the other way around. Second, she can't be a slut; it's very rare to see a female character in hentai who both admits she wants sex and actually cares about who she's getting it from. Third, perhaps the most common one, but still rare in combination, is that she wants the guy himself, not just anyone; it's a romantic attraction, not just a passing bit of lust. Fourth, there must be some sort of romantic connection; the characters have to care about each other to a real degree, so he can't just be looking to get his dick wet (or her just want his sperm, or whatever). Finally, she can't be crazy, so no rapists, yandere, or murderers; Luna Lovegood crazy is fine, but anything that makes you fear for your life is right out*. Additionally, as an optional but suggested criterion, it works better if she's a little shy; shyness isn't mandatory, and brazen interest and desire can be juat as attractive, but a touch of nerves paired with need sells the story so much better, that she wants YOU more than just wanting sex.
Most things fail in one or more categories. "You Are A Cute Prince" by Itou Ei fails because she doesn't take the first move, letting him get handsy with her instead of asking for it herself. "Buddy-Buddy Sisters" by Araiguma stumbles both because A: one sister doesn't really want it (at first), and B: they don't care who it is, so long as they get the dick. "Conception Valentine" by Nonoka Tama is disqualified, both because She Be Crazy and because there's no actual romance present, except the one-sided sort. Also, anything by Nishi Iori is out, because he writes sluts and essentially nothing else.
Combining the five real requirements is an amazingly rare thing in hentai, where women (or at least, female main characters) are either unwilling to admit thinking about sex at all, or else fucked five guys this morning already (it was a low-traffic day on the gangbang train). Any time all of these conditions trip at once, it becomes a rare and cherished event, like a solar eclipse. It's not the rarest thing in the world, no, but it is something special, to be valued.
To that end, I am curating a collection of works which fit these terms, ones which fulfill this most powerful of fetishes. However, I am but one man, and this site has more porn than any single human might hope to consume. As such, I present this request to the community: let me know when you see something that fits this definition. I'll maintain a list on this thread of all entries that fit the bill, updated as needed. And so, here's the list as it stands.
She Wants It, She Wants You:
"Look At Me!" by Hamao
"Hotspot" by Tarazoo
"Violet-Like Love" by Pennel
"Color Rendering" by Ikuhana Niro
"#girl" by Fujiyama (an edge case)
"Little Courage" by Wabara Hiro
"Grand Hotel Life" by sumiya
"Frills, Lace, and Something Lovely" by Aoi Miharu (an edge case)
*A special exception for stalkers; if it's the cute, "follows you home, watches you in class, adores you, and would be devastated if she couldn't get you, but is generally safe," stalker, that's fine and good. If it's the, "has made extra keys to your house, knows your friends and family by name, birthday, and bloodtype, has stolen your underpants and/or hair, and might kill you, herself, and any rivals to your love," kind of stalker, she is fucking crazy, get out, now.