H01393 Machi Gurumi no Wana: Hakudaku ni Mamireta Shitai Ep 1

Based on a game by Syrup. Takagi Atsuko takes a teaching position at Nansui Academy on a friend of her father's advice, only to find herself blackmailed by a student who uses his influence as the principal's son to force her into degrading acts. Her younger sister Yui, also a student there, discovers the truth and decides to confront the Murayama family to help Atsuko.