While Setsuna plays a violin in a clearing and Moroha overcooks pancakes in a portable cooking pot, she suddenly notices a bird being swallowed up by a pond of murky green water but Towa and Setsuna do not believe her and leave. They talk to Hisui and Kohaku, who concur that the pond is indeed inhabited by something that devours any who come near it. Seeing that Moroha was indeed correct, the half-demon twins leave to investigate the pond. Towa and Setsuna arrive, and Setsuna runs to stop young Hikoumaru from arguing with his younger sister Chiyo who wants to stop him from approaching the pond to avenge their parents, as she does not want to lose him, too...