Just a non-complete collection of some of my fave mark/hellyna fics out there, because sharing is caring:
over the threshold by fractions
---she's my beta but i'd recommend all of her writing even if she wasn't! This is a wonderfully soft, romantic story about all four versions of them interacting at the innie cabin.
Media Circus by marriedthediamond
---a extremely funny post-season 2 story told in social media posts, text message chains, and the notes app. Genuinely one of the best and most original fics I've ever read. It had me crying laughing and also squealing and kicking my feet.
Baird Creek by perpetual_novice
---a Notting Hill AU where where it-girl Helena Eagan meets Professor Mark Scout in a bookshop. perpetual_novice is absolutely the best at writing a romcom.
Starburned and Unkissed by Wthellyr
---a season one fic where Helly learns about her body (and her feelings for Mark). Very good characterization and some great smut.
and those wedding bells were ringing out our fate by Dee_needsaname
---AU where Mark and Helly have been married the whole time. One of my faves, very funny and romantic with some twists that will keep you always wanting more.
Heart Swells by Bellerophron
---A very sweet, tender and smutty oneshot, what more do you need?
acres of longing by lovetranscending
---an AU where Mark and Helly were married but divorced before the start of the series. I love this one, the emotions and feelings in it are just so good and keep you hooked.
---A post season 2 oneshot from Helly's pov, I feel like this one didn't get a lot of attention because it's written in the second person but its so good??? Please give it a shot if you haven't.