Matsoine
Fandoms
Recent works
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Summary
A cat slowly regains her memories from a human life, she now has to deal with finding a safe place but also think about the kittens in her stomach. Pregnant and scared, she finds her way into the Uchiha Compound.
Little does she or little Sasuke know, it would be a meeting for life. A better one for both of them.
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Flaming Heart by Matsoine
Fandoms: Katekyou Hitman Reborn!, Harry Potter - J. K. Rowling
28 Mar 2020
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Summary
Being put in Sawada Tsunayoshi's body was planned, that it was a male body... Not so much. Harriet Potter deals with it, she will never be male but agender she can. Though she still prefers female pronouns it's hard, so she just decided to be the cutest child she could be.
Flames consuming her entire form? Not planned as well, it didn't help Death was bending over laughing in the corner... At least her new form was adorable?
Harriet, now Tsuna, would conquer this world as well, just you wait!
Series
- Part 2 of Companion of Death
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Summary
Harriet Potter was bemused, falling into Death's arms wasn't supposed to do this.
Being reborn, Harriet finally learns to be truly happy. Also, how bored Gods can be and why half the shit that happens in mythology started. Boredom can really be the curse of worlds or even universes.
So Harriet, bored and wanting something new, reincarnated herself. This is her stories.
Series
- Part 1 of Companion of Death
Recent series
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Companion of Death by Matsoine
Fandom Harry Potter - J. K. Rowling, Katekyou Hitman Reborn!
28 Mar 2020
Summary
Harriet Potter and her many new adventures. Go read along with her on her new journeys!
- Words:
- 17,130
- Works:
- 2
- Bookmarks:
- 143
Recent bookmarks
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Teacher Grace's Extraordinary Curriculum by Acewithapaintbrush
Fandom Project Hail Mary (2026), Project Hail Mary - Andy Weir
07 Jul 2026
Summary
Grace has always been a teacher and it's not any different on Erid.
These are his adventures with his pebbles (and Rocky and Adrian of course)
- Words:
- 37,833
- Works:
- 6
- Bookmarks:
- 1,289
Bookmarked by Matsoine
21 Jul 2026
Bookmarker's Notes
This is so freaking cute, I love stories with Teacher Grace and his students (human or pebble🥹)
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The Greatest Act of Optimism by Acewithapaintbrush
Fandoms: Project Hail Mary - Andy Weir, Project Hail Mary (2026)
30 Apr 2026
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Summary
The Eridian thrills a high sound that doesn’t get picked up by the translator which means that it has no clear meaning. Like when a human gasps or sucks in a deep breath. It actually sounds a little like that. When they notice that I’m staring straight at them they scramble back into their hiding spot and hold very still.
A child, I realize with a start.
That’s a child!
“Hey,” I call and the kid squeaks again. I was about to get to my feet but abort the movement and crawl closer on my hands and knees until I'm inches away from the xenonite wall. I wait and it takes me much too long to realize that they don’t have to peek around the corner to see if I’m still there.
“Hey there,” I try again, my voice low and calm. It’s my teacher voice, the one I use for shy and scared students.
Used.
The fact that I haven’t had to use it for years and it still comes to me automatically almost knocks the air out of my lungs but this is not about me, it’s about making sure the little pebble doesn’t die of fright from the scary alien. “Hi, I’m Grace. It’s alright, you don’t have to be scared.”
***
How Grace finally gets back into a classroom, where he belongsSeries
- Part 1 of Teacher Grace's Extraordinary Curriculum
- Language:
- English
- Words:
- 6,881
- Chapters:
- 1/1
- Comments:
- 930
- Kudos:
- 11,003
- Bookmarks:
- 1,911
- Hits:
- 57,023
Bookmarked by Matsoine
21 Jul 2026
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where nothing bleeds by interstellarisms
Fandoms: Iron Lung (2026), Project Hail Mary (2026), Project Hail Mary - Andy Weir
10 Apr 2026
Tags
Summary
Simon didn’t expect his savior to be exactly his type.
What a welcome sight. Even if this stupidly handsome man ends up being evil, or working for the C.O.I, at least he’d die looking at something good.
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Grace and Rocky find Simon's ship floating in deep space on their way to Erid.
UPDATE: This fic has been peer reviewed by a NASA engineer who has approved of the science!
- Language:
- English
- Words:
- 26,850
- Chapters:
- 10/10
- Comments:
- 2,239
- Kudos:
- 26,548
- Bookmarks:
- 5,770
- Hits:
- 311,577
Bookmarked by Matsoine
21 Jul 2026
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one half of a whole by interstellarisms
Fandoms: Project Hail Mary (2026), Project Hail Mary - Andy Weir, The Fall Guy (2024)
19 Apr 2026
Tags
Summary
Eva feels like the breath is knocked out of her lungs when the man walks in.
Dirty blond hair. Blue eyes. Sort of like… if Ryland Grace was hit by a car several times. It was undeniably him.
“So you’re Eva Stratt,” The man says gruffly, slamming both hands on her desk. He looked exactly like Ryland, it was terrifying. It felt like watching a ghost haunt her in real life.
“You’re the crazy woman that sent my baby brother up into space. Let’s talk, yeah?”
or
Colt Seavers finds out his twin brother was sent on a suicide mission. He does not take it well.
- Language:
- English
- Words:
- 20,263
- Chapters:
- 5/5
- Comments:
- 898
- Kudos:
- 11,513
- Bookmarks:
- 2,373
- Hits:
- 81,594
Bookmarked by Matsoine
21 Jul 2026
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Project Ship by RegTheRag
Fandoms: Project Hail Mary - Andy Weir, Project Hail Mary (2026), Andy Weir's Project Hail Mary - All Media Types
10 Jul 2026
Tags
Summary
A Rocky POV of Project Hail Mary, but add in a sprinkle of originally named astrophages, petrova lines, language barriers, trauma recovery, and extra, extra worldbuilding. Includes pre- and post-canon!
La traduccion al espanol by MichiHolmes! Gracias!
***
One day, his strumming was not answered.
The silence that answered his one verse of song was horrible and grating. Incomplete. Empty. A sick, horrible fear built up inside him.
(He was going to die out here. Alone.)
***
"Iz huhg," Grace sniffled out, sucking back in moisture from his noze, too. There was moisture and water and everything all over the place. "Huhg meens grayt, grayt, grayt affekshun."
"Oh," he said tentatively. Another hewmin thing! He shuffled closest to the wall Grace was huhging and leaned in. "Oh. Am I doing correctly, hmm?"
"Yis," Grace sighed out, calming down. He still leaked, though.
Oh, well. Leaky hewmins were his favorite, after all.
- Language:
- English
- Words:
- 110,610
- Chapters:
- 45/?
- Comments:
- 1,472
- Kudos:
- 2,983
- Bookmarks:
- 864
- Hits:
- 79,062
Bookmarked by Matsoine
20 Jul 2026