One day he met Zui at the railroad crossing, they started seeing each other at a certain time of the day
So while Aisu was coming back to the forest, Zui was coming back to the city
At first they was just staring at each other while waiting the train to cross, But after some time they noticed that they couldn't just stay and stare each other everyday
so Zui one day had the idea in writing a note for Aisu with only his name, so next day after waiting the train to cross and the barriers to open, Zui gave the note to Aisu and just kept his way to the city without saying any words (they haven't talked to each other ever)
So next day Aisu decides to do the same thing
And so they been giving those notes to each other every time the barriers opened while crossing the railroad
They was sometimes telling things about their life, things they liked or even secrets
But the notes could not last forever
Almost all that Aisu was writing were nothing more than lies and it didn't take Zui a long time to know it
He actually knew since the first time, he knew this wouldn't go anywhere but he just kept smiling with that "fake" smile, and Zui starts thinking it was all his mistake
Zui stopped sending the notes to Aisu, and Aisu knew he messed it up but he didn't stop sending the notes to him
Zui have been trying "avoid" Aisu just because he don't wanted to make more mistakes and that made Aisu think that Zui maybe hates him
Aisu actually really wanted to know Zui since he was the only one in being nice to him
He just told Zui all the truth and also started to collect flowers everyday and give them to Zui but things never got fixed...