I think... I've once read a manga just like this, about how they met on a train. so I think this isn't a one shot..
It's actually a two-shot, which is listed here as From Aiu Station On The Hiragana Line. Dunno why it got posted twice, but actually I think I like this one better on its own as a one-shot.
I think... I've once read a manga just like this, about how they met on a train. so I think this isn't a one shot..