Mature Content Description

The developers describe the content like this:

This game contains content that is not suitable for all ages or may be inappropriate for use at work place : nudity or sexual suggestive content - scene of sexual activity,
sexual assault/non-consensual sex. this game appropriate only for adult audiences

All characters related to game content are 18 years of age or older, and the game is made of 2D animation-style characters, not real characters.

About This Content

The addition of a new Heroin!
Enjoying the story of Rival of fate in "Shirogami Renki". Kuromiya Kasumi.
Let's solve the puzzle and liberate her from"The World of GLASS"!

The eldest daughter of the Kuromiya family, the arch-rivals of the Shirogami family. Called a prodigy since a very young age,
she has shown extraordinary talent for casting spells that amplifies people's Lust.
"She maintains a cocky, confident attitude, and has proven her formidable abilities time and again.

But Kasumi has also tasted bitter defeat, when she challenged Renki Shirogami."
She experienced humiliation for the first time, as her famed Erotic Curses were instantly purified by Renki's magic.
On that day, Kasumi declared herself a rival to Renki, and since then she has constantly demanded a proper showdown between the two.
Today was like any other day - As usual, Kasumi was trying to come up with new ideas on how to mess with Renki, when she was suddenly hit by an incredibly dense cloud of Lust. And beyond that cloud, the World of Glass was beckoning to her———