Got E-Ink e-reader Likebook Mars T80D I'll be able to read manga more comfortable from now on.
@Leradvor I had searched E-Ink e-reader which is not Kindle, Kobo. This device's os is Android 6. Therefore, can install and use favorite apps. Of course, instaling Kindle app seems to also be possible. I have never used FBReader.
We are a cute and loving international community Ｏ(≧▽≦)Ｏ !