Why would she be miserable lol, the last chapter was justifying fuckboi forcing himself on her in the name of love, Airi can just make her forget about Shinobu and be happy with Fuckboi who also accepts the cons of dating an actress. We might also get a scene where Shinobu wants to clear the misunderstanding but Sakura refuses to listen saying that she doesnt care about the past and is with the fuckboi now.
If you want something to happen, the opposite will probably happen, the misunderstanding will never get resolved and was just a way to reel the readers till the last chapter so they keep buying expecting a satisfying ending. There isnt enough time for consequences for anyone atp or even something that is remotely satisfying for the readers.
The only good thing is that we wont have to put up with Airi's retarded writing anymore after this ends so thats good atleast. And yeah, next time dont expect anything good from japanese writers especially those with track record of ntr.
the korean writers are better but its like choosing which one is the less worse out of them and japanese