Abyss -異世界の少女-

Developer: 一人オンライン
Release: 2015-11-25
Work Format: RPG
Censored: Partial (some are censored, some nope)
Translator: Chronomium
Genre: 2dcg, 2d Game, Female Protagonist, Male Domination, Rape, Vaginal Sex, Creampie, Pregnancy, Tentacles, Oral Sex, Masturbation, Internal View, Lesbian, Group Sex, Censored, Loli, Japanese Game, RPG

Long story short (google translate, btw), a girl coming back from school picks up a book, and decide to be the heroine of another world. There her objective will be to defeat the demon king. The same. Always the same. Maybe they watched too much Isekai..