Well, to give some happy greetings to the hot season, I thought that I might try something new, namely in the form of a duet between the two bands cinnamons and evening cinema. I had never heard of either band before coming across their August 2017 collaboration "Summertime" so I will have to focus on them separately, but in the meantime, I'm happy to make my acquaintance with this cheerful number that has Mariko Suzuki（鈴木まりこ）of cinnamons and Natsuki Harada（原田夏樹）of evening cinema sharing vocals, with the latter responsible for words and music.
The band cinnamons formed in 2016 and consists of Suzuki, guitarist Shinji Aoyama（青山慎司）and drummer eric, and their profile states that their music features "a candy voice and twinkling sound" while providing "music for Japanese TV programs and advertisements". They've also provided their share of CDs and digital downloads including "Summertime" which is one of the latter.
evening cinema is an AOR group which with Harada also includes guitarist Tomohiro Hikawa（樋川智宏）, bassist Kazuaki Yamamoto（山本和明）and drummer Taiki Abe（アベタイキ）. It started up in 2015 and according to this website, the members have a deep love for the pop music of the 1970s and 1980s which they have incorporated into the sounds of music from the later decades.
Looks like some other fans have created their own physical interpretations to "Summertime". As mentioned, I'll have to explore both cinnamons and evening cinema on their own.