This song is connected with other three songs in "Friends".
Itsuka No Merry X-mas, Boku No Tsumi, Koi Jyanakunaru Hi, Doushitemo Kimi Wo Ushinaitakunai

BOKU NO TSUMI
My Sin

Yameta tabako ni te wo dasu youni
Kimi ni denwa wo kaketeiru boku wa

Igokochi no ii basho dake wo
Sagashite aruku yatsu nano ka
Kokoro no suki no nui nagara
Kotoba ga afurete kuru "Aitai"

(*) I know, I know, wakatteru
Mada, mada, toki wa jubun ni sugitenai
Boku dake no flying da ne
Don't you know? Shitteru hazu
Kanzen ni boku no tsumi nanda
Tsumi ga hajimatte kurikaesu

Kamigata kaeta kimi wa araware
Tokidoki miseru egao wa kawattenai

Yaritai koto wo yaru tame dato
Sore zore no michi wo erande
Wakareta koto wo mou sukkari
Wasurete shimai souna toki ga tsuzuku yo

Repeat (*)

Shikkari kimi wo tsukamaero to
Dareka ga boku ni sasayaku kedo
Nani ka ga chigau to kanjiru no wa
Boku ga tada okubyo na dake nano ka

Repeat (*)

With a hand reaching out for the cigarettes which I have quit
I give you a call

Am I only a guy who walks on
Only to search for a good place of comfort?
While sewing up the gap in the heart
The words come bursting out "I wanna see you"

(*) I know, I know, I understand
Not yet, not yet, not enough time has passed yet
It's just me who is flying alone
Don't you know? You should know
It's completely my own sin
Only the sin repeating itself

You appear with a different hair-style
But the smile that I get to see sometimes has not changed

For the sake of doing the things we want to do
We have chosen our separate ways
Time continues to flow as if
Our breaking-up has been thoroughly forgotten

"Catch her tightly"
Somebody is whispering to me
I sense that something is different already
Am I only being a coward?

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