Hello! Spank - Season 1 Episode 17 His secret

Aiko and Seiya Tsukahara, a transfer student, are still in a fight if they meet. Despite the conflict between the owners, Spank and Baron seem to be brothers, and they went out to the city today as well. Aya, a mysterious woman (actually Seiya's older sister) appeared there. The next day, there was a strange rumor that Seiya lived with a woman. Because of that, Seiya will confront Banchozan. But I know that the rumor is a terrible misunderstanding. Seiya is hated again when she is beaten by Aiko who rushed to help. Aiko could understand Seiya's heart hidden behind those words...