This has been a very good story, well animated and surprising in how much information can be put into an episode without making it confusing. this final volume takes a definitive turn toward an "x-files" atmosphere. Although the origin of the "infection" isn"t clarified, that"s not the point of the story, the point being friendship and coming of age.\r\nIn the extras section of the DVD the director mentions a second part for the series, in the form of two ova"s, so let"s hope amazon will have them available soon enough!