ESCALATION_~蒼い抱擁~ エスカレーション~蒼い抱擁~ Escalation_~Aoi_Houyou~
Escalation ~Aoi Houyou~ is a visual novel with sexual content developed by Melody and released on 1999. The english translated game, Escalation ~Hard Core~ was released on 2002, with a further DVD released on 2006.

It's part of the [[Escalation]] series which is connected to the anime [[Cream Lemon]].

VNDB entry: https://vndb.org/v3133
escalation hardcore