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...
Um, it's the first time I've seen 
you on the morning train.
Ähm, das ist das erste Mal, dass ich dich
morgens im Zug zur Schule treffe.
Es la primera vez que te veo 
en el tren por la mañana.
Es la primera vez que te veo 
en el tren por la mañana.
Euh…
Ehm, è la prima volta che ci incontriamo
sul treno di mattina, vero?
É a primeira vez que 
te vejo no trem da manhã.