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Build-a-Waifu Harem Adventure 2: A Tsundere Ex and Android Creation Sci-Fi LitRPG
He built three android waifus. Now he’s building more.
One misdirected package gave a nerdy engineer the power to design and fabricate android companions from a purring catgirl with heat cycles she can’t control, a platinum blonde bombshell whose curves won’t stay clothed and whose devotion has no off switch, and a sophisticated auburn-haired beauty who surrenders her composure like a gift every time they’re alone. They’re a found family now. They’ve already fought a corporation to stay together. And Alex isn’t done creating. New to the series? Start with Book 1: Build-a-Waifu Harem Adventure.
Two new companions. Five women total. The harem expands.
The Tsundere. Athletic build, sharp green eyes, his ex-girlfriend’s face. Designed to be everything the real one wasn’t. But the original’s fire bleeds she argues, provokes, gets under his skin, then melts the moment he takes control. Every fight leads somewhere hotter. She loves losing as much as she loves the battle.
The Analyst. Silver-white hair, glowing violet eyes, built from pure imagination. She sees the Creation System’s raw data, reads bond values in real time, and approaches intimacy as an experiment worth running. Then pleasure overwhelms her brilliant mind, her commentary fragments into syllables, and watching her lose the ability to think becomes its own reward.
The original three are evolving.
The catgirl isn’t shy anymore. She initiates, holds eye contact, and tells him exactly what she wants. Twitching ears, expressive tail, and every sound she makes is deliberate now.
The bombshell burns hotter than ever. Her temperature spikes in ways the system can’t explain. Something is changing inside her, and it’s making everything more intense.
The woman in wine-red lipstick and stockings needs him more than before. Her false memories are pulling harder, and every time the bond deepens, she needs him to remind her who she is.
Bigger threats. Higher stakes. Deeper bonds.
Comedy-forward sci-fi harem LitRPG with android creation, system progression, five devoted companions, escalating intimacy, and a found family that keeps getting tested. If you like tsundere fire-and-surrender, cerebral women losing control, catgirl confidence, and bombshells with secrets, this is your series.
Start with Book 1: Build-a-Waifu Harem Adventure. Read free with Kindle Unlimited.
One misdirected package gave a nerdy engineer the power to design and fabricate android companions from a purring catgirl with heat cycles she can’t control, a platinum blonde bombshell whose curves won’t stay clothed and whose devotion has no off switch, and a sophisticated auburn-haired beauty who surrenders her composure like a gift every time they’re alone. They’re a found family now. They’ve already fought a corporation to stay together. And Alex isn’t done creating. New to the series? Start with Book 1: Build-a-Waifu Harem Adventure.
Two new companions. Five women total. The harem expands.
The Tsundere. Athletic build, sharp green eyes, his ex-girlfriend’s face. Designed to be everything the real one wasn’t. But the original’s fire bleeds she argues, provokes, gets under his skin, then melts the moment he takes control. Every fight leads somewhere hotter. She loves losing as much as she loves the battle.
The Analyst. Silver-white hair, glowing violet eyes, built from pure imagination. She sees the Creation System’s raw data, reads bond values in real time, and approaches intimacy as an experiment worth running. Then pleasure overwhelms her brilliant mind, her commentary fragments into syllables, and watching her lose the ability to think becomes its own reward.
The original three are evolving.
The catgirl isn’t shy anymore. She initiates, holds eye contact, and tells him exactly what she wants. Twitching ears, expressive tail, and every sound she makes is deliberate now.
The bombshell burns hotter than ever. Her temperature spikes in ways the system can’t explain. Something is changing inside her, and it’s making everything more intense.
The woman in wine-red lipstick and stockings needs him more than before. Her false memories are pulling harder, and every time the bond deepens, she needs him to remind her who she is.
Bigger threats. Higher stakes. Deeper bonds.
Comedy-forward sci-fi harem LitRPG with android creation, system progression, five devoted companions, escalating intimacy, and a found family that keeps getting tested. If you like tsundere fire-and-surrender, cerebral women losing control, catgirl confidence, and bombshells with secrets, this is your series.
Start with Book 1: Build-a-Waifu Harem Adventure. Read free with Kindle Unlimited.
315 pages, Kindle Edition
Published March 13, 2026
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Displaying 1 of 1 review
March 23, 2026
Great characters and settings let down by inconsistencies
A fun continuation of book one. I really like the setting and the gradual hints at something deeper behind it. The characters are (mostly) really likeable, too.
At a grammar level, this is exceptionally well written -- better than many traditionally published books I've read. At a deeper level, however, it has many inconsistencies, both within this book and between this book and the first. There are some big ones (like both the author and the characters seeming to forget, for at least half the book, about the company from which the device was stolen), and lots of little ones. As an author, if you're going to mention details then make sure that you get the details right! It's far better to leave the details out than it is to include them and get them wrong.
A simple example is Sasha's lactation: the author needs to decide whether it was a slider or a toggle and stick to it; and shouldn't mention a time frame of three weeks for when it first appeared, when in the first book it was much quicker than that. Similarly with how the device works -- now there's suddenly a "fabrication platform" and a computer connected to it?
And why does Tessa freak out at seeing Mika's ears after she's already been looking at them and touching them!? That whole scene was completely inconsistent with a scene just a few pages earlier.
There are also huge, glaring plot holes, just like the first book.
The author writes individual scenes very well, has excellent grammar, creates believable characters, and has great ideas. But he is very poor at putting all of that together in a consistent and logical manner. While most self-published Kindle Unlimited books I've read really need a proofreader, this author's works have absolutely no need of one, but they really do need an editor for the higher-level stuff.
A fun continuation of book one. I really like the setting and the gradual hints at something deeper behind it. The characters are (mostly) really likeable, too.
At a grammar level, this is exceptionally well written -- better than many traditionally published books I've read. At a deeper level, however, it has many inconsistencies, both within this book and between this book and the first. There are some big ones (like both the author and the characters seeming to forget, for at least half the book, about the company from which the device was stolen), and lots of little ones. As an author, if you're going to mention details then make sure that you get the details right! It's far better to leave the details out than it is to include them and get them wrong.
A simple example is Sasha's lactation: the author needs to decide whether it was a slider or a toggle and stick to it; and shouldn't mention a time frame of three weeks for when it first appeared, when in the first book it was much quicker than that. Similarly with how the device works -- now there's suddenly a "fabrication platform" and a computer connected to it?
And why does Tessa freak out at seeing Mika's ears after she's already been looking at them and touching them!? That whole scene was completely inconsistent with a scene just a few pages earlier.
There are also huge, glaring plot holes, just like the first book.
The author writes individual scenes very well, has excellent grammar, creates believable characters, and has great ideas. But he is very poor at putting all of that together in a consistent and logical manner. While most self-published Kindle Unlimited books I've read really need a proofreader, this author's works have absolutely no need of one, but they really do need an editor for the higher-level stuff.
Displaying 1 of 1 review