Board Thread:Questions and Answers/@comment-2A02:C7F:383F:F000:3C8C:ADC0:2E5B:5FEA-20190119124740/@comment-181.193.214.186-20190322120258

As far as I know, several fans asked Nakaba and his editor about this topic and they directly mention they actullay have a mother. But besides the question in Twitter and the question in chapter 283, there is no further information.