Important: This is a voice work - with some game elements using an HTML interface.
DLsite (jp): https://www.dlsite.com/maniax/work/=/product_id/RJ283484.html
DLsite (en): https://www.dlsite.com/ecchi-eng/work/=/product_id/RE283484.html
Overview since no ULMF thread and not a 'real' game:
This...