A new version has been released with additional characters in 2019/04/29
Haven't found 1.8 anywhere, only 1.7...
https://www.dlsite.com/maniax/work/=/product_id/RJ144379.html
Original Title:小さなみち花
Romaji: Chīsana michi hana
Released Date: 2017/11/05/
Company, Producer: ミルクココアセーキ
Dlsite link: https://www.dlsite.com/maniax/work/=/product_id/RJ212278.html