I think it's because he regrouped it all in one sentence. To be more accurate, it should be like this.
chatterchatter...but I'm very happy she did.One day, Kaga-san suddenly disappeared from my back.I don't know why she's decided to leave me alone...staaaare...She doesn't really come in contact with her as well...between Shoukaku and Akagi-san....Doesn't seem like there's anything