I may be missing on plot, as I’m not familiar with the Darling In The Franxx series, from what I can tell we watch the two main characters from the series, Zero Two and her male partner. He discovers her past memories of being group-raped, she feels defiled and thinks she doesn’t deserve to be with him, he tells he doesn’t care as he loves her, and then they have all-day sex, this is it ^^
In terms of drawing quality, this might be the best Darling In The Franxx doujinshi I’ve read to this day, you can tell the two characters care for each other, there’s subtlety and talent in the art, it was nice.
My thanks, for this release, go to Snipetress, Haruto and Pet Recna, from Cat On Heat Translations
There’s plenty more for you on The list of Puyocha’s works on Hentairules!