Fuutarou wants to know how Yotsuba really feels.
But Yotsuba ran away.
Fuutarou lost her while chasing.
Itsuki was walking towards their direction.
And pointed to where Yotsuba ran off to.
Itsuki told him what he should do (Itsuki went back to the infirmary to eat Karaage?)
Fuuts is playing the victim card. (prob to draw her out)
Throwback to chapter 21.
Flashback from chapter 64 (the spring part), that's how it was used to recognize yotsuba.