dont know shinobu pretty much looks like he can get his life in order again, he got his movie and fumi on top gaining feelings for her. Slutkura looks like her life is in order, she is more successful in her career than before. So both are doing fine at this point.
its poorly writing. I dont know i thought its common atp that airi is trash in creating drama and coming up with a solution. Even coming with the nagi and mio card she managed to crash the broken car with 200mph again... I have to give her that. I havent read a manga that is that shit in this genre before. Could also be because i dont fucking know other ntr romcom.