Nasa and Tsukasa are now enjoying newlywed life as guests of the Arisugawa family. Things proceed normally until they receive a call from Nasa's previous landlord, offering them an apartment at a newly constructed building. The two of them go to check out a showroom of their potential new home, arriving at a high-rise apartment building.
My position as big sister 
is being reduced to nothing!
!على هذا المنوال، وضعيّتي كأخت كبرى ستتقلّص
Wenn’s so weitergeht, hab ich
als große Schwester null Bedeutung!
Mi rol de hermana quedará en cero.
¡Como Zero's Tea Time!
Mi rol de hermana quedará en cero.
¡Como Zero's Tea Time!
À ce rythme,
plus besoin de grande sœur !
Sta minacciando la mia posizione 
di sorella maggiore!
Desse jeito, serei um zero à esquerda
como irmã mais velha! Um zero na vida!
Моя роль старшей сестры почти ушла!
Я не влияю на жизнь!