1 - 20 of 82 Bookmarks by Ftmkasa
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He wasn’t a guy who was so easily scared, much less of Shadow, but… Somehow, Sonic felt goosebumps trailing through his body, as if some instinctive part of him felt that something was wrong. His survival instincts screamed that he would have a better chance of staying safe on the raging storm outside than continuing inside, which was a ludicrous idea. Sonic knew Shadow wouldn’t hurt him (not much, at least), so why was he having such a dreadful feeling growing in the pit of his stomach?
Or
Shadow is missing, and Sonic is called into a mission to find and bring him back. Even with the lingering feeling that something is wrong, Sonic still agrees to help, but maybe he should've listened to his instincts this time.
Bookmarked by Ftmkasa
14 May 2026
Bookmarker's Notes
what a mental fuck this fic was yet i loved it holy shit
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He didn’t even see the result yet, but just the way Amy is looking at him is making him feel his stomach twisting once again for all the different reasons from before. Instinctively all his fur and quills raise up in alert as he feels his mouth running dry. It can’t be, it can't be.
Two lines.
Two damn lines.Or
Sonic and Shadow may just be friends with benefits, yet it's very clear they have deeper feelings for each other.
But all it took was one pregnancy test for everything to change.Bookmarked by Ftmkasa
10 May 2026
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Tenma Vs Kamishiro: who will end up on top? by I_Written_Rose_I
Fandoms: プロジェクトセカイ カラフルステージ！| Project SEKAI COLORFUL STAGE! (Video Game)
02 Apr 2026
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Tsukasa has always been a grade A top student, but since arriving at high school, he has always been bested by student sweetheart Rui Kamishiro.
With their third year just beginning, Tsukasa needs to find a new tactic in order to finally win the school over and take top spot!
Tsukasa did not intend for that to involve hate-sex with Rui…
Series
- Part 1 of Tenma Vs Kamishiro
Bookmarked by Ftmkasa
10 Mar 2026
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Wedding Ring Under Glove by Nebrasska
Fandoms: Sonic the Hedgehog - All Media Types, Sonic the Hedgehog (Video Games)
26 Apr 2026
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After a drunk night out, Sonic wakes up the next morning with something unexpected adorning his finger, concealed just under the fabric of his glove.
A wedding band.
With no recollection of the night prior and how such a thing could have possibly gotten there, Sonic takes it upon himself to discover who his mysterious and elusive partner is, all without divulging the secret of his newfound marital status to anyone. Starting with a list of potential names, things only escalate from there.
- Language:
- English
- Words:
- 50,337
- Chapters:
- 10/13
- Comments:
- 682
- Kudos:
- 1,767
- Bookmarks:
- 250
- Hits:
- 38,432
Bookmarked by Ftmkasa
27 Nov 2025
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The Secrets In Our Quills by Nebrasska
Fandoms: Sonic the Hedgehog - All Media Types, Sonic the Hedgehog (Video Games), Sonic the Hedgehog (Live Action Universe)
07 Apr 2025
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With Dr. Robotnik defeated and the Earth saved from complete annihilation, Sonic expects to enjoy the rest of his days getting into all sorts of mischief with his friends and family, content to relax until the next catastrophe strikes.
However, there is just one loose end for him to tie up, and that is the unlikely survival of Shadow the Hedgehog…
…because against his better judgment, his blooming companionship with Shadow becomes Sonic’s best-kept secret.
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loving, leaving, pulling, pushing by whotae
Fandoms: Sonic the Hedgehog - All Media Types
18 May 2025
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It's a fact that Shadow and Sonic are rivals. Red and blue, sun and moon. They were true opposites, and that was just the push and pull of their relationship. But when a chain of events lead to everybody thinking they're dating instead of actively trying to kill each other, the two (one begrudgingly, the other enthusiastically) decide that playing along is in their best interest.
Or; Sonic and Shadow end up roped up into a fake-dating relationship to avoid their friends, but get more than just a headache along the way.
Bookmarked by Ftmkasa
14 Nov 2025
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Original author’s summary:
At first, I just wanted to write about Sonic and Shadow who still held underdeveloped world views. Then I thought it would be fun to write about a self-confident Sonic hitting a wall, so I wrote this… it’s just something short.
This story contains the many wrong decisions they make, so if you don’t mind, then please continue reading…Bookmarked by Ftmkasa
02 Nov 2025
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Good Behaviour by Muni_2
Fandoms: Sonic the Hedgehog - All Media Types, Sonic the Hedgehog (Video Games)
26 Oct 2025
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Life for Shadow after everything had become so... boring. Food, pleasure, sex, all reduced to being mundane.
Every bite of a meal was bland, every crunch of a once loved snack was frustrating, every lick across a stranger's fur leaving him with nothing but his imagination, every kiss was empty...
It was all pointless.
That is, until the moment he's pinned below his rival during a fight, finally gifted the taste of something that he'd been so desperately craving.
or: Shadow loses his sense of taste suddenly thanks to complications with his Black Arms DNA. During a heated fight, Shadow comes to the realisation that maybe Sonic was more use to him than he thought.
Sonic thinks it wise to experiment and find out what tastes the best.
Bookmarked by Ftmkasa
29 Oct 2025
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come back to earth by orphan_account
Fandoms: プロジェクトセカイ カラフルステージ！| Project SEKAI COLORFUL STAGE! (Video Game)
10 Oct 2022
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Rui tries to persuade Tsukasa into smoking with him. Tsukasa, in his endless generosity, caves.
It’s only a little. And it’s better with a friend.
Bookmarked by Ftmkasa
13 Aug 2025
Bookmarker's Notes
This might be my favorite one ever I love this fic sm
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You'd be cute if you were dead by Kasablender (M1kuD4y0)
Fandoms: プロジェクトセカイ カラフルステージ！| Project SEKAI COLORFUL STAGE! (Video Game)
26 Dec 2024
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Bookmarked by Ftmkasa
13 Feb 2025
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i get heaven to myself when i’m with you by starlights_88
Fandoms: プロジェクトセカイ カラフルステージ！| Project SEKAI COLORFUL STAGE! (Video Game)
17 Jun 2024
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“Well, I can tell you all the science and theory you want, but I firmly believe that a proper hands-on experience will teach you more than any article or biology book will. I can help you with that… if you want," the last part comes out hushed. His previous certain smile wavers along with his voice, realizing the way he was presenting himself, the implications of his own words.
☆
What are you supposed to do when the person you’ve been longing for seasons on end asks you a sensitive question? For Rui, that answer is obvious: you simply lay-off the rational parts of your brain, let all your brain cells die and offer yourself to help.
Bookmarked by Ftmkasa
18 Jun 2024
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Bookmarked by Ftmkasa
19 Apr 2024
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Inconvenienced Heat by orphan_account
Fandoms: プロジェクトセカイ カラフルステージ！| Project SEKAI COLORFUL STAGE! (Video Game)
04 Apr 2024
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Rui, by all means, was a "good boy" for his owner. He helped out around the house, cleaned up, killed mice, helped out in the garden... Things like that. However, whenever he misbehaved, he sure did misbehave. And Tsukasa would, normally, reprimand him appropriately. Whatever that was, whether it was forcing him to eat his vegetables or making him go to bed early on the weekends, making it so he couldn't play with his inventions late at night. Simple things like that.
However, in this case, not even Tsukasa would know what would be a worthy punishment for such a situation.
Bookmarked by Ftmkasa
04 Apr 2024
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Tsukasa's Secret by monochromelake
Fandoms: プロジェクトセカイ カラフルステージ！| Project SEKAI COLORFUL STAGE! (Video Game)
19 Nov 2023
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Tsukasa insists that he's an upstanding guy. But when Rui finds his secret, that self-belief is put to the test. Things only spiral from there, and soon Tsukasa finds himself in deeper than he meant to go. And Rui deeper in him than he ever hoped.
Bookmarked by Ftmkasa
23 Nov 2023
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Mr. Vampire! Trick or treat? by orphan_account
Fandoms: プロジェクトセカイ カラフルステージ！| Project SEKAI COLORFUL STAGE! (Video Game)
31 Oct 2023
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On a Halloween night, Tsukasa wanders a little too far away from his friends and ends up in a big, mysterious house. But the man inside it greeted him with such a nice smile… it can't be so bad, right?
Bookmarked by Ftmkasa
31 Oct 2023
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A figment of imagination by Anonymous
Fandoms: プロジェクトセカイ カラフルステージ！| Project SEKAI COLORFUL STAGE! (Video Game)
27 Oct 2023
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Summary
Warning: this fic involves smut 🫶
Tsukasa’s newest role is…new, that’s for sure. It unlocks something in him and thankfully for him, it unlocks something in Rui too.
- Language:
- English
- Words:
- 2,845
- Chapters:
- 1/1
- Collections:
- 1
- Comments:
- 6
- Kudos:
- 150
- Bookmarks:
- 10
- Hits:
- 3,842
Bookmarked by Ftmkasa
29 Oct 2023
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Care by Leo_Starry
Fandoms: プロジェクトセカイ カラフルステージ！| Project SEKAI COLORFUL STAGE! (Video Game)
18 Sep 2023
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Summary
Rui gives Tsukasa a simple task, and Tsukasa is always eager to please. How much of a good boy can Tsukasa be for his boyfriend?
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Or: Sequel to ‘Relax,’ a continuation of Ruikasa’s piss play adventuresSeries
- Part 2 of Ruikasa’s piss play adventures
Bookmarked by Ftmkasa
27 Sep 2023
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Slanted at 45 Degrees by rumoredAlkaloid
Fandoms: プロジェクトセカイ カラフルステージ！| Project SEKAI COLORFUL STAGE! (Video Game)
24 Mar 2023
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Summary
Tsukasa has been struggling with his schoolwork lately, and Rui offers to help him “study”.
What does Rui mean by studying?
He means building a robot to do all of Tsukasa's schoolwork for him, obviously.
However, hard work and labour doesn’t come without a price..
And Tsukasa is willing to give back to Rui in any way possible.Bookmarked by Ftmkasa
22 Aug 2023
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But I can't resist... by orphan_account
Fandoms: プロジェクトセカイ カラフルステージ！| Project SEKAI COLORFUL STAGE! (Video Game)
17 Feb 2023
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A little boy can always develop a crush on a teacher. But what happens when the love is actually reciprocated? Our little Tsukasa will find it out on valentine's day with his favorite teacher and biggest love, Kamishiro Rui. It can't be so troublesome... Can it?
Series
- Part 1 of teacher rui ♡shota tsukasa
Bookmarked by Ftmkasa
15 Aug 2023
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workplace accidents by orphan_account
Fandoms: プロジェクトセカイ カラフルステージ！| Project SEKAI COLORFUL STAGE! (Video Game)
09 Feb 2023
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Summary
rui really likes tsukasa. but one day he messes up and he wants to apologize! orr rui gets a little too silly.
Bookmarked by Ftmkasa
14 Aug 2023