Escalation!

Escalation! is a visual novel with 3D model animation about a couple who begin BDSM sessions. The protagonist has a masochistic propensity and gathers the courage to tell his girlfriend that he wants to try being dominated. She responds positively, and as they open up to each other, their relationship develops through domination and submission.

Saki

Saki, voiced by Aruha Kotone, is the protagonist’s girlfriend. They are the same age and have been dating for just over a year. Taller and slimmer than average, she has long black hair. The couple recently moved into an apartment together, and Saki has always had a sadistic talent; she now embraces the dominant role.