[Machine Translation] This album is based on the basic concept of "Summer 4 Rhythm Vol. 2", and develops a new world of 4Rhythm. This concept album expresses an adult summer night with the theme of "City/Night", another image that is twin to Toshio Kadomatsu's "Sea/Summer". The album is full of playfulness, with quiet and cool songs reminiscent of Steely Dan, technical songs that band members will want to copy, and "Beach Days," the only song on the album that evokes daytime, with its signature sea-summer sound in full bloom! [Participating musicians] Toyomu Tamada (Dr.) / Hideki Matsubara (Ba) / Tsuyoshi Kon (Gt) / Toshiyuki Mori (Key)