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...
I've never been sick!
Ich war noch nie krank.
Nunca me he enfermado.
Nunca me he puesto enfermo.
Je ne suis jamais vraiment 
tombé malade.
Non mi sono mai ammalato seriamente in vita mia!
Nunca fico doente!