blue archive,noa \(blue archive\),noa \(pajamas\) \(blue archive\),yuuka \(blue archive\),yuuka \(pajamas\) \(blue archive\),2girls,blanket,book,breasts,frilled pajamas,frills,hairband,halo,long sleeves,mechanical halo,multiple girls,nightgown,official alternate costume,pajamas,pillow,purple eyes,purple hair,sleeping,sleepwear,under covers,upper body,white hair,white hairband,white halo,white nightgown,white pajamas,