Escalation: Kyōai no Fugue

Escalation: Kyōai no Fugue is a yuri visual novel which follows Rie Komatsuzaki, a girl who has recently been sent to a prestigious Catholic boarding school named St. Yale Academy after discovering her mother having an affair with her home tutor, whom Rie also had a crush on. Feeling alone in the school's harsh atmosphere, Rie seeks solace in the school chapel, only to find two other girls named Naomi and Midori secretly making love. Upon noticing Rie, Naomi and Midori decide to teach her about the joys of lesbian sex.

The game features full voice acting and has multiple endings which can be achieved depending on the player's choices.