You are absolutely right... Previously there was video one of this song Nagisa of Roses, and it was a live recording from music TV show Midnight Special Studio 1978 but it seems deleted from RU-vid... so sad...
I think in my very personal judgement and perspectives, both main actresses look as equally good as each other cuz they are acting as a sister pair having same blood ties.. Seriously narration of the whole story is from a first person the elder sister's angle and perspective, also the younger sister keeps holding contrary views and never listens to her sister due to mutual misunderstanding already existed from the beginning of this TV serials. As I can remember the whole serial was rather short, having 9 episodes only. The most attraction highlights should be the exclusive but exaggerated tennis smashing skills that both sisters sneakily trained up respectively themselves, only to reveal their true capabilities and innovative skills when both sisters collide with each other as finals competitors. The definitive championship of 新沙沙, the sister, is to prove the way, vision, the philosophy and core values as a super tennis player are all right and sophisticated; whereas the younger sister often lacks composure and her rebellious character often foreshadows in the way she treats true family relationships and her one and only remaining sister that she loathes but in her inner heart, the young sister knows what's wrong with her approach to life. Before the finals, she never adopts a respectable manner to her sister. In the whole story, she demonstrates hard work, innovative skills and approach most often aims at gaining more honorable achievement and beating down her sister in tournaments just with a retaliation ill- intention and combatting opponents as major life purpose via tennis. The elder sister acts all things in a reversed way with a pure pursuit of family reunion and harmony. Tennis to her is always secondary. Pursuing and hard training towards championship is a disguise of her real intention to recover her relationship with her closest one on earth, that is her younger sister. She never takes any pride even if she is literally more powerful in tennis. She is confident but to her younger sister, she often could not be lighthearted cuz she could be very assertive and decisive in match, but she is gloomy about both maintaining the well being of family and being convinced to her young sister to prove all her values are on a righteous track. She isn't afraid of taking challenge and being creative in the on spot skills. She cares and views less about achievement, championship, loss or painfully beaten by anyone. But her true care towards her young sister; being rejected and receiving denial from het sister often interrupt her performance and spoil her mood in live play. Sorry for writing so long here, 😁 Gomenasai... 🙇🙇🙇... I just wanna keep an archive via this reply and write as much I could, because when I grow older, I am not certain if I would have all these good and fond memories lost both about the TV serials and in reality the past atmosphere of my family and the society I lived in when being feverish to this TV classic play ... Thank you for reading this. Cheers... Bill