First Inuyasha is worried about what Kagome said to him about his transformations. He goes to find Totosei and ask how to stop this. He tells him that he has to Destroy Ryuukotsusei his fathers enemy that was sealed by his father. The gang are looking for inuyasha. He is gone already with Mioga heading for Ryuukotsusei. The gang go to Totosei and he tells them that he went to Fight Ryuukotsusei. Naraku finds out about the plans and goes to unseal Ryuukotsusei. Totosei thinks that Inuyasha was the one who unseal Ryuukotsusei to try to beat him himself. Inuyasha is fighting with Ryuukotsusei and he thinks to himself that the reason Tetsiaga is heavier because it was mad of his fang which is nothing to his father's. So he thinks if his father couldn't beat him and he could he would surpass his father.

Meanwhile, Totosei and the gang are all headed for them and he tells them that the only way Inuyasha might be able to defeat this demon is to use Tetseiga's ultimate attack Bakuryuuha which is a much stronger attack than that of the Wind Scar. He says the Wind Scar is for the starters.

Inuyasha is still fighting when he loses the Tetseiga. He tries to retrieve it and he gets knocked back down. He then starts to transform and then the gang gets there.