Invited to walk around the culture festival together by Shirogane, Kaguya is unable to hide her surprise at this sudden plot twist. She lightly joked that maybe he was affected by the festival's atmosphere, but Shirogane never dropped his serious expression. Compelled by such intensity, Kaguya decided to walk around the school together. Everyone around them gossips that they are on a date as Kaguya blushes. But while they enjoy visiting a love fortune-teller, food shops and live music, Kaguya feels true happiness. From the depths of her heart, she wishes that each day could continue just like this.
So this absolutely has to be a confession
from Ishigami's rival in love!
!لا بدّ أنّ هذا اعتراف من غريم إيشيغامي في الحب إذًا
Ihr muss zweifellos einer seiner Rivalen
seine Liebe gestanden haben.
así que se le declaró
uno de sus rivales.
así que se le ha declarado
uno de sus rivales.
Il s’agit donc d’un de ses rivaux !
Non c'è dubbio,
então foi uma declaração
de um de seus rivais.
Вывод напрашивается сам: 
девушке признался его соперник!