Once the two return to the house, Yoki decides to ask Nui why she's been staying in the mountain. Nui reveals that she used to be a travelling Mushishi but at one point her husband, son, and other villagers were lost while travelling in the mountain. In her attempt to find them, she stumbled upon the Tokayami. Nui knows the consequences of being trapped inside a Tokoyami and therefore decided to sit in the area in case her fellow villagers are still wandering around. Much to Yoki's surprise, however, Nui has been waiting for almost 6 years. Because of this Yoki offers his help and asks Nui to allow him to stay in the place. Nui, however, refuses the boy's request on the base that she wants to do this on her own. She also tells Yoki that Yoki should also leave the place soon. Yoki, who's not happy with Nui's answer, believes that Nui is hiding something. Therefore after she falls asleep, he decides to do his own investigation.

Unfortunately, Yoki's idea of investigation involves going to the pond at dawn and stirring the water inside the pond while calling out for Tokoyami and 'Ginko'. All of a sudden, a huge thick smoke appears out of the forest and enters the lake. The lake quickly becomes as bright as silver and inside the lake, the remaining eye of the fish looks as if it's dissolved. After a while, the fish suddenly disappears. Nui then appears and scolds Yoki for looking at the bright light intently even though she already told him not to do this. Yoki tells Nui that he now understands why there are only one-eyed fish. It's because once they lose both eyes, the fish will disappear. Nui corrects Yoki and tells the boy that the fish do not disappear. The light that 'Ginko' emits simply turns the fish into Tokoyami, making them as one. Upon finding out about this Yoki becomes angry because Nui doesn't seem to be doing anything about it even though she claims to be a Mushishi.

Nui, however, tells Yoki that from those who managed to escape, it is known that the only thing they can do is to run away. Ever since ancient times, Mushishi have actually looked for ways to solve this. Similarly, Nui has been conducting her own study of 'Ginko' by examining the fish in the pond. As a result, she too has been exposed to too much light. In her study, she seperates the one-eyed fish from the pond and ensure that they do not exposed to Mushi's light. Despite this, the fish starts to show signs of albinism sooner or later. And once they lose both eyes, they turn into Tokoyami. Despite this, Nui still refuses the possibility that her own husband and child have probably turned into Tokoyami as well. Right now, however, it's too late to do anything so she asks Yoki to leave the area. She advises him to go on a lifetime trip since he has no place to call home. Yoki at first refuses but eventually is forced to leave by Nui.

The next day, the silver light from the Mushi begins to expand and eventually claims Nui's remaining eyes, turning her into Tokoyami as well. Yoki who sees the bright light from a far decides to return and on his way sees a dark shadow similar to Nui. In his carelessness, he makes a grab for her and is instantly enveloped by Tokoyami as well. He eventually finds himself in a complete darkness and notices a bright light which looks like Nui. Nui asks Yoki to leave before 'Ginko' awakes and then go as far away as possible. She then leads Yoki and tells him that unlike her, his arm is still warm. After several steps, Nui tells Yoki to close one eye and keep going. Apparently Yoki needs to give one eye to 'Ginko' in order to get out of Tokoyami. He, however, needs to ensure that the other eye remains shut until he can see sunlight. As soon as Nui said this, however, she realises that she can't go any further because 'Ginko' is already awaken.

Nui's shape quickly disperse into light sparks and as this happens, Yoki can see a giant worm/serpent moving in the darkness. Yoki realises that the serpent is 'Ginko', the bottom of Eternal darkness. After 'Ginko' disappears, Yoki continues to walk for ages until he realises that he can smell the soil and see the moon. He, however, can't seem to remember his own name. The next day, Yoki finally sees the sunlight and is found by a farmer who happens to pass by. As expected, however, his appearance has changed. His hair is now white and his right eye is now green. A few days later, Yoki seems to return to a healthy state although it seems he can't remember anything apart from his name. Yoki also notices that his left eye now looks like a black hole and his presence seems to attract Mushi. He believes that if this continues disaster will happen to the place. Later on the farmer is seen looking for Yoki, who has disappeared from the house. The name that the farmer used to call Yoki, however, is Ginko.

Impression

Well, I had fun trying to supress Yoki's real identity until the last sentence. I also find it interesting that Yoki is now using the name of the very thing that caused him the loss of Nui and his left eye. If I think about it, however, I am not sure if Yoki actually remember his own real name or his past. So his decision to use 'Ginko' as a name is probably an instinctive one because it's the only name that he can remember after his traumatic encounter with the Mushi. The incident also made me wonder about Yoki/Ginko's fate in the future. Will he eventually lose both eyes and turn into Tokoyami like the fish and Nui? Or does that only happen if he's close to 'Tokoyami/Ginko' Mushi? Moving on to other topic, I find the Mushi itself is interestingly paradoxical in the sense that it is some kind of light in the darkness. It is also very bright to the point that it turns other things into darkness. It reminds me that the presence of light is most noticeable in complete darkness.