Hajimete Wo Itadaku Wa (“I’ll Be Taking Your First Time”) [English], by Kurokoshi You
The female heroine in that share has a charming but totally fake personality. In public, she’s a little miss perfect in all regards, hiding that everyone’s looks of admiration are like oxygen for her. It’s only with her (male, of course) childhood friend that she’s her true, natural self: childish, full of weird ideas, honest. How’s that, for a typical but “efficient” vanilla setup? ^^
Because I liked the story, I’ll be an asshole and tell you *nothing* of it. I’d rather you discover it by yourselves. It ain’t much, but it’s honest vanilla work
It’s been released by Dynellen, Crystalium, Nero and Katyusha, from Team Koinaka, thank you very much!
By the same artist, I also share In-Suru (227 pictures), Yome To Asobou, Onee-chan Wa Shinpaishou, Tanu Chichi, Hanayome Sakari, High Risk Game, Lovetuber, CATch Me, Twinkle, and, last but not least, Yuudachu (“A Sudden Evening Rain”) (now Uncensored!)
And now, the download & gallery links 
Open the Complete Pictures Gallery
Download the Free Hentai Manga in a Zip file
(26 MB, 31 pictures, English)
Or you can also use the Alternative:
Zip Mirror #1 – or – Zip Mirror #2 – or – Zip Mirror #3
Yeah, Karen is a not-really-rare Japanese name which seems to have originated completely independently of the Western name, and is pronounced a bit differently – much more press on the “e” than in English, roughly kah-renn. Bit hard to find a good, non-Japanese source, but something like https://www.behindthename.com/bb/fact/4527435 is helpful enough.
I’m sure someone else is more educated on the topic.
So she is the same as one of the MCs in Kareshi Kanojo no Jijou https://mangadex.org/chapter/422605/9 . Interesting.
Hmm, … another time, place and artist/author, this could have gotten downright ugly if Karen only went after Soutarou to get on what she considered an equal footing with her “rival”. Of course, it could be argued that such was her original intent, but perhaps suppressed feelings were awakened as they “got down to business”. If so, can live with that.
http://memedad.com/memes/623682.jpg
I imagine her gynecologist is going to become world-famous when he writes his paper on her amazing triple-socket vagina from page 20. When these two overcome their latex allergy, dude might as well just wear a rubber glove when he’s banging her multi-hole.
I learn the damnedest things from porn.
Deflowered by grilled dick.
C
Is it weird that I’m more interested in the other girl? I want to know her story. Heck, I feel like she HAS a story.