To be frank, Kindred Spirits is as good as light H-Scenes get, although this is Yuri.
Assuming this works for you, check out this one. It doesn't have H-Scenes, but it is equally romantic in the same vein as the above.
The Second Reproduction does not contain H-Scenes in the truest sense of the word, but the H-Scenes are very much a thing. They simply aren't written. Only the lead-up and what comes after, which are particularly romantic.
In Koisuru Natsu no Last Resort they go at it like dogs. What this does have, from what little I've played of it, is considerable pillow talk scenes, so if you're looking for that, those are really good and not something VNs usually focus on (Haven't finished even one route).
In ef - a fairy tale of the two., there seems to be about one H-Scene per romanceable interest. As a result, the one H-Scene I did read was quite romantic, and indeed one of the better ones in that department (Have only finished one "route").
I can back up Kurisu-chan in that Key works are typically quite romantic, but the H-Scenes are allegedly bad. The one H-Scene I read in Air didn't spark much of a feeling either way, so I won't dismiss them on those grounds, but I won't recommend them either.
As for Sakurai Hikaru's works, I'll talk on behalf of Gahkthun only. The H-Scenes in this title don't focus on romance, they focus on many other matters especially. It has one H-Scene at the end but it felt completely tacked-on to me. I didn't read it, but you might enjoy it if you can put up with the rest of the H-Scenes.
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Any old Eroge will have romantic H-Scenes, but not all of them give any serious focus to the romance, instead focusing on the sex. For the most part, that is precisely why the H-Scenes are there in the first place. Your best bet are Eroge with only one H-Scene per route, like (unless I'm misremembering) A Profile and Deardrops. Most other Eroge with only one H-Scene compensates by making said H-Scene very long (and some do both, like Noble Works), forgetting the romance entirely and getting caught up in the sex.
Hmm... Have you played Kindred Spirits? That is pretty much the definition of romance during sex. A character repeatedly shouting "I love you" not so much. EDIT: It even includes some fairly strong "persuading the heroines into sex"; Even if most Eroge work, I wouldn't ever recommend Noble works. Regardless, I don't know what the OP is looking for absolutely. Perhaps anything will do.
I do remember the H-Scenes in Katawa Shoujo were fairly romantic in nature, so much so that I read them back when I'd barely started VNs.