Chizuko's Younger Sister (ふたり, Futari, "Pair") is a 1991 Japanese film directed by Nobuhiko Obayashi.

However, during the attack, a person resembling Chizuko silently gestures towards a rock on the ground, which Mika uses to hit her assailant and get away safely.

At the concert, a man named Tomoya Kaminaga (神永哲也 Kaminaga Tomoya) mistakes Mika for Chizuko; he and Chizuko were lovers, and had agreed to meet at the concert.

Mika's parents, while watching her sprint through the finish line, comment that she looks like Chizuko.

That night, Mika receives a phone call from Mariko, who apologizes for stealing her love letter.

In actuality, Mika was not hurt, and she is left to take care of her family's house alone.

Due to her familial situation, Mika declines to perform the leading role in the play, instead becoming the prop master.

After helping her mother to bed, Mika reprimands her father for his actions and denounces his mistress as a bad person.

Mika finds a letter-opening knife in Chizuko's room and decides to stab her father with it.

Kaminaga asks Mika to travel around the world with him, but she declines, preferring to stay in her town.