「昔の友人が変わらずにいる」と言う物悪くない物だな… (Gintama) [solo guitar]

The title reads:
["Mukashi no yuujin ga kawarazu ni iru" to iu mono warukunai mono da na...]
or in English: [The so-called "old friend does not change" is not a bad thing...]

Yes I know it's a long title, and it is from…