It's only 1 chapter alright, it doesn't mark as complete either, i think there are continuation Basically yuuji and gojo going out with term that they will end it once yuuji graduating (gojo is his teacher) Along the way yuuji changing into omega (he is beta leaning omega from the start) So if he is one, they don't need time limit for their relationship either It ends with them still contemplating future so i think there is more to it
Translation is 'the fruitless flower cannot provide eternity' and I think it centred around the fact that Yuji was a beta and so many people (inside and outside of this doujinshi) centre childbirth as something essential. A literal go big or go home.
Perhaps when humans were dying out, absolutely. As this is fictional, there's probably more than 8 million people in the world already like there is in reality. Honestly, sit yourself down and - in the words of Omni Man - THINK society.
Again, pretty art, though the age gap is out presenting problems. Shoko makes an appearance, which is awesome. Megumi and Nobara have iconic lines and Ijichi is bullied and set behind schedule as usual. Splendid!