The Class A Finals pit Arata vs Shinobu, Class B is between Taichi and Rion in the same area where Komano is participating in the Class C Final. Chihaya is stuck between supporting Taichi and Komano or experiencing the match between Arata and Shinobu.
karuta is about taking 
10 cards from your opponent.
se trata de tomar 10 cartas de tu oponente.
se trata de coger 10 cartas de tu oponente.
de pegar 10 cartas do seu oponente.