Subaru and Kawase are having a meeting at Subaru's house to discuss cover designs and promotions for the upcoming print release of Subaru's novel. Kawase says there's been strong demand from a store owner to hold an autograph signing event, but the antisocial Subaru is repulsed by the idea and refuses. Then, suddenly, the doorbell rings, and Subaru's house is overrun with children!
Sorry for bringing so many 
people over without notice.
Perdón por venir sin previo aviso.
Perdón por venir sin avisar.
Scusi se ci siamo presentati all'improvviso
 in così tanti...
Nos desculpe por trazer
tanta gente sem avisar...
Прости, что пришли толпой 
без предупреждения.