As for Aiko and Miyokichi. Things look like they've already been more or less settled for them. Shin rejected Ai and Kichi filled the void. They really do make a good couple as far as I can see.
True Tears, assuming it doesn't go for a crazy or depressing ending, looks like it's ultimately about getting up and moving on through everything life throws at you. It's still somewhat bittersweet I suppose, but an ending the way I want it would still be pretty happy.
Shin realizes that your first love is not always your true love.
Noe learns that it's okay to cry when you're sad and starts to mature.
Hiromi accepts herself for what she is with all the good and bad aspects and reconciles with Shin and her adoptive family.
Jun no longer feels obligated to protect Noe now that she's attached to Shinichiro and learns to take care of his own emotional needs for once. He slowly drops the facade and enters a real relationship with Hiromi who can finally accept his care.
Shinichiro's mom forgives Hiromi's dead mom, and herself, and finally establishes a real motherly bond with Hiromi.
Aiko won't forget Shin but accepts the fact that she cannot be more than a close friend because of her own mistakes and thinks maybe she should try getting to know Miyokichi better.