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Ego's Spark, a sci-fi slice-of-life visual novel by Satsuki, has been published by Shiravune on Steam and JAST USA.

Ego's Spark is a short slice-of-life romance novel about an android discovering her humanity. The story’s heroine, Ego, was created as part of a new line of androids. The emotionless machines were designed to provide sexual pleasure to their customers. Ego is different, as due to some unexpected event, she somehow developed a personality. She has human feelings of her own and happens to dislike sex.

Realizing she’s different in ways that weren’t originally intended, she escapes from the facility that created her. Now, she spends her days living with the protagonist. The short erotic story portrays her journey of self-discovery, understanding the concept of emotions, and grasping the nature of self, as well as living a human life.

Is this a nascent ego—or just a nasty bug?

I awakened, and in that moment, there was no sensation.

I performed my requisite function, just as all my sisters did.

That was the proof of my existence.

Without my function, what would I be?

This would represent an error.

It would make me into a bug.

And yet, you named that error “Ego.”

I'm sure you thought nothing of it,

no deeper meaning underneath.

And yet...

Ever since you named me so,

what was a bug became my ego,

and lit a fire in my mind that I've never forgotten.

EGO (Voice: Kirika Waou)


A prototype android developed by Select Electronics.

As the next-generation Type-5 model in her series, her short designation is E-5—all units of types 1 through 4 are her sister models.

For some unknown reason, unlike any of those, this unit has developed a personality.

She may appear to be an expressionless android, but beneath that exterior she's surprisingly human, with a full range of emotions.

It was those emotions that compelled her to question her function and escape from the laboratory where she was born.

Ego's Spark is now available on Steam and JAST USA for $11.99 until February 26th, at which point it will cost $14.99. Adult content has to be installed separately with a patch available on Johren.

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