#and Sae raises an eyebrow at Shidou for sharing that bit of info about rin

[blanc-et-n0ir]

Shidou and Isagi being best friends while they're both dating their respective Itoshis would make for a KILLER and hilarious double date/meet the parents.

Double date would have Rin killing Shidou with his glare while Shidou continues to rile him up to the exasperation (Isagi) and fondness (Sae) of the onlookers. When Rin and Shidou start arguing and fighting, Isagi and Sae are just at the corner watching it all happen.

Even funnier if somehow Shidou and Isagi know far too much about the other Itoshi sibling because Rin and Sae enjoy talking about each other to their boyfriends so Shidou and Isagi's text messages to one another are just them exchanging tips and fun facts cause they're each other's best wingman

Even before they start dating the Itoshis, Shidou and Isagi are just. Wingmanning each other. Shidou picking fights with Rin so when he storms off, he gives Isagi a thumbs up which he reciprocates because now he has a chance to talk to Rin alone in the locker room before everyone else starts crowding it. Isagi giving Shidou little tidbits of information about Sae from when Rin would sometimes reference him so Shidou knows what to do and give to Sae to woo him.

When they do decide to confess they hype each other up and when they start dating Shidou and Isagi share a secret high five cause they managed to bag the best baddies around. The Itoshies are blissfully unaware up until their first double date and somehow Isagi and Shidou are FAR TOO coordinated with the date plans and everything.

Then Bachira spills the beans to Rin (BC BachiRin friendship is PEAK) and Rin shakes Isagi like WHAT DO YOU MEAN YOU'RE FRIENDS WITH THAT BROTHER STEALING INSECT and Isagi let's himself be shaken and he just goes "we had a shared interest" "what interest" "... We both liked an Itoshi" which leads to the biggest crash out ever cause on one hand he doesn't know to be thankful that Shidou got him and Isagi together and on the other THAT MEANT ISAGI GOT SHIDOU AND S A E TOGETHER

Sae is just a little bit impressed that somehow those two managed to get things rolling and he isn't all that bothered about it.