The apparition named Menoumaru shows up in front of Inuyasha who looks for Shikon no tama. The purpose of Menoumaru was Tessaiga though other apparitions were aiming at Shikon no tama of Kagome. Why does Menoumaru seek for Tessaiga?
Time goes back for 300 years further. Chief of apparitions who had attacked Japan from the continent were fathers of Menoumaru. Apparitions were repulsed by Inuyasha's father at that time, and Menoumaru was sealed. But, that seal was canceled after 300 years, and Menoumaru was revived. And, he tries to obtain Tessaiga somehow. Why?
And, why does Kagome fight against Inuyasha?