For Doraya! Sorry I got kinda carried away ORZ 

The break trio spends part of their summer vacations together since first year. It was probably Endou who thought of doing this first, inviting everyone over to his house without even telling his mom (canon material). But soon they switched between Gouenji’s and Kidou’s houses too. I figure both Endou and Gouenji have pretty normal wizard households, but Kidou’s family would live in nothing less than a castle. A BIG fairytale-southern-german-fashion-like castle. And despite both Endou and Gouenji getting lost the first few days looking for the loo at night, they would have the most fun.

Think about it, non stop quidditch talks, non stop quidditch matches, manly slumber parties (Kidou’s bed is so big they probably get lost in the sheets, oops), skinny dipping at the local lake, stealing liquor from their parents’ cabinet in the middle of the night - and proceeding to send drunk owls to almost everyone they know at school…:

“No no no!”, says Endou with tears in his eyes as he proclaims “Let Kidou write this one!”

Kidou hiccups and grabs the quill from Gouenji’s hands “Well… ‘Dear Fudou… I hope you’re doing swell, we’re having a great, great, great time. ~ Yours truly, Kidou and CIA’”.