Their debut of "P.S. I Love You" may have been the most successful single by rock band Pink Sapphire , but I also enjoyed their 3rd single, "Hello, Goodbye". Having nothing to do with The Beatles, this was a song that came out in January 1991 with music by Hiroyuki Miyaguchi （宮口博行）and lyrics by 美遊砂. Unfortunately, I couldn't quite find the proper pronunciation for the lyricist although the last two characters read out as Yusa according to jisho.org.
In any case, "Hello, Goodbye" has a similar sound to the aforementioned debut but there is that wonderful guitar riff in the refrain and lead vocal Aya's voice is a bit more toned down with this one. I caught the official music video on one of the early morning video clip shows as my eyes were opening up; I definitely made sure the volume button was kept somewhat low to be kind to my neighbours (apartment walls are notoriously thin in Japan), but, yeah, quite the aural way to wake up. The song managed to peak at No. 8 on Oricon.