Nayuta and Miyako walk in on Itsuki, who was naked in front of the bathroom mirror, trying to act out the little sister character in his new volume. Itsuki is everything to Nayuta, and Miyako secretly has some feelings for Itsuki, but Nayuta also cherishes Miyako because she showed her compassion in her time of need. Nayuta invites Miyako to the hotel she’s staying at and immediately gets naked. She then asks Miyako to also get naked for some kind of research for her novel...
One day I'm going to create 
the ultimate little sister!
Eines Tages werd ich die
ultimative Imouto schaffen!
¡Un día crearé la hermana
pequeña definitiva!
¡Un día crearé la hermana
pequeña definitiva!
Un jour, je créerai
la petite sœur ultime !
Un giorno creerò la sorellina definitiva!
Um dia eu vou criar a 
irmã mais nova perfeita!
Вот увидите, однажды я создам
самую лучшую младшую сестру на свете!