Hoshi Asuna - Mother-s Best Friend Vec-641 -kan... -

First, I should verify if Hoshi Asuna is a known character from a specific series. A quick search tells me that Asuna is a main character in the light novel "Sword Art Online" by Reki Kawahara, but her surname there is Yuuki, not Hoshi. Maybe this is an alternative universe version or a fan-made game. Alternatively, "Hoshi" could be part of the title or release name here.