The time when it starts moving Episode 5

The mid-term tests are coming up and Nozomu has to study, but Billy chews up his English notes. He goes to the Ichijō twins' house and borrows Sumireko's notes and later meets Kaoruko when he is photocopying the notes at the convenience store. He discovers that both Sumireko and Kaoruko only made the childhood promise with him because of the rivalry between them.