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...
It might be something she can't tell you...
Vielleicht kann sie es dir nicht sagen.
Tal vez sea algo que no te pueda contar.
Tal vez sea algo que no te pueda contar.
C’est peut-être difficile 
à expliquer.
Potrebbe essere qualcosa che non riesce a dirti...
Talvez ela não possa.