Kana (u), Shin (s), and Sora are chilhood friend for 20 years.
They already be friend from 4 years old.
Sora' house at Kana's left side and Sora house at Kana's right side.
Tanabata this year is 20th anniversary of they are become friend.
And Kana decide to confess his feeling to sora ( have already 10 year ).
Kana tell Shin first bout his feeling towards Sora.
But schockly, in the same day, Sora tell Kana and Shin that he is going out whit a guy for 2 years.
Of course Kana is sad.
But........ He even more shock of Shin confess his feeling to Kana.
Shin said that he'll make Kana love him.
Tonari ni Kedamono