Ai, Sunakawa's sister three years his senior, is shocked to learn during a home visit that Takeo is dating. Having secretly harbored feelings of her own for Takeo, Ai is suspicious of Takeo's girlfriend and launches her own investigation...
When it's just the two of us, 
I think she gets nervous.
أظن أنها تشعر بالتوتر عندما نبقى بمفردنا
Sicher verunsichert es sie,
wenn sie mit mir alleine ist.
Creo que se pone nerviosa 
cuando estamos a solas.
Creo que se pone nerviosa 
cuando estamos a solas.
Elle sera nerveuse si on est seuls.
Penso che si agiti quando siamo soli.
Quando ficamos a sós, 
bate um nervosismo nela.