So yes, Tidus and Shuin became the biggest cross-dressers in the world, didn't fall in love for they were both straight despite their cross-dressing habits, but stayed best friends forever and lived together in a mud hut next to the banks of a river.
Day 5 of mud hut:

Shuin: umm... Can I borrow your cheerleading outfit?
Tidus: What for?
Shuin: I have a big debut in luca threatre!!!
Tidus:... I thought u were banned from there
Shuin: They didn't mean that... everyone want SHUIN!!!!
*Runs out the door*

Tidus: Be back before supper!

In Luca Stadium...

Shuin in wig putting on lipstick: I'd like to have a concert!
Man: You have to try out to sing in a concert.
Shuin: Ok! Gimme a S! *shakes pink pom-poms*
Man: S?
Shuin: Gimme a H!
Man: H?
Shuin: Gimme a U I N!
Everyone: U I N!
Shuin: Put it all toghter and thats ME!!! *starts to shake the pom-poms in the air*

On stage...

Shuin: Are you ready to rock.. SPIRA GIRL STYLE!?

Shuin: Spira Girl Role Call! *screams prepishly*

Shuin!!! *Dances*
Tidus!!! *Bats eyes*
Wakka!!! *Courtsies*
Auron!!! *Flashes sword*
Shuin: Auron... *gives evil eye*
Auron: Eh... I mean:
Auron!!! *Throws pretty flowers*

All: YEY!!!

Voices: Not so fast Spira Girls!
Spira Girls: Like, What?
Voices: Where the... LUCA GIRLS!!!
*Luca girls do dance*
Wakka: *glares* I knew your guys were girls!

... To be continued