Ayano has just started fitting in at the badminton club when Serigaya Kaoruko, ace at Konan High School, appears. Ayano is upset by her presence, and appears to have some past connection with her.
I thought she could stand on her own.
رأيت أن بمقدورها تدبّر أمرها بنفسها
y supuse que estaría bien sola.
y supuse que estaría bien sola.
Perciò ho pensato che
potesse cavarsela anche da sola.
com isso, a Ayano vai 
 conseguir ser independente.
так что она наверняка сама справится.