Itsuki falls asleep at the kotatsu and has a dream. He dreams about his darker middle school days. His mother had just died and he falls in love with a certain girl, but... Back in modern time, Itsuki celebrates his book becoming an anime and has a mixer at his apartment. Haruto brings over a board game about being a light novel artist and they all play. What kind of results will they all get in the end?
As long as I have the longing 
for a little sister,
Solange es mich nach Imoutos verzehrt,
kann ich alles schaffen!
Mientras anhele una hermanita,
Mientras anhele una hermanita,
Grâce à ma soif de petites sœurs,
je suis capable de tout !
Finché mi rimarrà questo desiderio inappagato,
Contanto que eu anseie
uma irmã mais nova,
И пока я её желаю,