Ah, Mash... The starter servant and the only Shielder in FGO. Also, according to this doujin, in possession of limitless stamina and sex drive, capable of running her master dry. Abandon all hope for a plot...

A virtual space was created by the scientist at Chaldea, allowing Master and Mash to spend some time together on a date, like a normal couple. They hang around, visit the arcade, eat some food together and...