This was a concert appearance of Seiko performing the song. She also made many appearances on "The Best Ten"show while "Tenshi no Wink"populated the charts. Apparently every time the song charted as one of the top ten of that week, she appeared in-studio or on location to the extent that she could've been promoted to co-host. However, when she got married to her first husband, Masaki Kanda（神田正輝） in April 1985, those appearances abruptly stopped. And then came the declaration of her hiatus from performing until all the way forward to New Year's Eve when she appeared on that year's Kohaku Utagassen to perform the song. Probably not a dry eye in any of her fans when that happened.
This is Ami Ozaki's own cover of "Tenshi no Wink"which has a bit more of a rock approach to it. It was a track on Ozaki's 13th album, "Juu-banme no Myu"(１０番目のミュー....The Tenth Mew), which was released in September 1985. By the way, Seiko's version is on her 11th album, "The 9th Wave" released in June of the same year.