Adult PC Game: Kokage no Izumi - Demon Angel SAKURA: The Forbidden Mirror Ver3.0.0.1 Win/Android/Mac (eng) Archive

Heaven and hell. A realm of angels, a realm of demons.
Two opposite worlds connected by a "gate", a neutral vast stretch of space.
The two worlds rarely interact, due to the negative effects of
each realm's "silk" which cripples anyone from the opposite.