Sister Efner, falling into Darkness because of the Futanari Succubi

Bad Sister Ephnel.
She always does things she can't do as a sister.
she intended to go out for a night out as usual, but she was caught by futanari Succubus.

Ephnel is turning to the dark side by Futanari Sucubus...

If you look at the story first, you can see Story mode and Endless mode.

You can also move the screen's Ephnel with your mouse!

And if you complete the mission, you can see the ending!

And if you watch the ending, you might add something to the title screen...?