Well, after reading the manga n then watched the anime, that question did come out. But perhaps to Keiichi, whether she did or did not wear that ring both them know that there is this inseparable bond between of them. She did confess her love for him in ep 10 2nd season and again when she asked him to rpeat that magic word 'suki' and why she wants to hear it.
I do hope i can c that ring though.Perhaps, in the next season-if there is anyway. :)
cheers
05-Sep-2007