It's not really depressing though, in the end there was hope. Just imagine visits and talks once Tsubame has time to figure out why Saori's touches always upset her. It's clear that Saori is head over heels, Tsubame just has to grow up a little to understand more. ^.^
These nice things have a certain way of not happening, unfortunately. Two people are sure they'll see each other again, but all it takes is for one party to fail to communicate a single time, for a relationship to evaporate.
"Sometimes a dream is just a dream, it feels so real for so long, and then, in an instant, it's gone."
The difference is, we don't see this failure. I prefer to think of it as something different.
In two months when Tsubame's dad returns, she's coaxed into visiting Saori (it really doesn't take much convincing). She's in awe of Tokyo, of how Saori still shines so brightly in the city. They make up no thanks to Tsubame's very awkward attempts.
Fast forward eight months. They've been keeping in contact, though Saori is busy. She's loving the city and her new acting troupe, but parts of her still miss Tsubame. She thinks maybe it's for the best, and soon she'll be able to move on. Not yet though; she's not in a hurry to get her heart broken again.
Tsubame, who always thought she'd be content in her village, itches to see Tokyo again. Well, that's how she interprets it. Soon she'll finish school, and maybe in the back of her mind is a niggling thought (that she doesn't acknowledge) that maybe Tokyo wouldn't be a bad place to live, at least for a little while. She decides to visit Saori again during the break.
It strikes Saori how much she still loves Tsubame, even after so many months of distance. She tries not to fall back into old traps, but Tsubame acclimates surprisingly well to Saori's odd schedule.
Tsubame has always loved watching Saori perform, but when she sits in on rehearsal and sees how Saori acts with another of the actresses, a kernel of jealousy grows in her heart. She doesn't understand it, not fully. It grows the longer she stays. The day before she's set to return home and she sees the other actress touching her Saori, it suddenly strikes her.
That night, Saori surprises her with strawberry tarts and Tsubame tries in her very awkward way to talk to Saori. It doesn't go well. Frustrated, Tsubame sees how red Saori's lips are from the strawberries and has an idea. The kiss is short, but both girls are blushing furiously. Tsubame makes an awkward comment about how it looked like Saori's lip was bleeding.
Saori kisses her again.
The end scene would be Tsubame grinning on the train home - until someone notices her. She stops for a moment, but then goes right back to smiling. Her heart is full, and she's decided to apply to some schools in Tokyo after all. Who knows what kind of trouble Saori would get to on her own.
Ahem, anyway, that's how I like to think of it.
I love this headcanon! Thanks for coming up with it.