#bluesides

written for the @tf-kinktober2025 event

Rating: Explicit

Summary: Bluestreak has a secret fantasy. A fantasy his new partner Sunstreaker and his brother are more than happy to fulfill.

AO3 Tags:

Relationships:

Bluestreak/Sunstreaker (Transformers)

Bluestreak/Sideswipe

Bluestreak/Sideswipe/Sunstreaker (Transformers)

Sideswipe/Sunstreaker

Characters:

Bluestreak (Transformers)

Sunstreaker (Transformers)

Sideswipe (Transformers)

Additional Tags:

Threesome - M/M/M

Threesome

sex on a couch

Twincest

Incest

Sibling Incest

Kind Of

like they don't have sex with eachother

but their having sex with the same guy at the same time

split sparks do some weird things

Bluestreak and Sunstreaker are dating

Sideswipe thinks his brothers boyfreind is cute

Notes:

This one is short but took me several hours. Ugh I think I'm coming down with something (just my luck I guess).

⸝⸝⸝𐬹🥛༄♡ ₊˚🫐

After a long time, thought of revising Basic Immunology course. Raining outside. It's been a year! Blueish Black Theme and recalling the first class of Basic Immunology when it was raining outside and professor was teaching us this topic, how nostalgic!

And right now listening to ~blue side by j-hope~ giving me a cozy vibe.