As far as I can tell, this is the cover page to a short comic in a book called Planet Walk (惑星さんぽ), so I think this belongs to "toi8"? I can't say for sure though

Mizekel said:

As far as I can tell, this is the cover page to a short comic in a book called Planet Walk (惑星さんぽ), so I think this belongs to "toi8"? I can't say for sure though

Confirmed. 1,890 JPY.

• http://www.amazon.co.jp/dp/4862691552/#reader_4862691552