(I know it's not Heathers but it works)
This is Jack Mark Felix and Ethan. Jack as H. Duke, Mark as H. Chandler, Felix as H. M, and Ethan as Veronica Sawyer.
Ethan p.o.v kinda
AlmightyMithicB(Mark): Boys boys
BroccoliB(Jack/Sean): What Mark
SwedishMeatballB(Felix):Yeah what is it this time
Ethan: Yes Mark
AlmightyMithicB: I need my little forgery artist on Monday
Ethan: for what
AlmightyMithicB: I need a love letter to Tyler in Singe's handwriting
BroccoliB: W-what you can't do that
AlmightyMithicB: Shut up Jack
BroccoliB: Sorry Mark
Ethan: why exactly
SwedishMeatballB: Kindergarten at recess remember
Ethan: yes I remember that Tyler talked about it all day
AlmightyMithicB: Then it's settled
Ethan: No Tyler's smart he'll know it's fake
BroccoliB: C'mon his reaction will be awesome
AlmightyMithicB: Ethan you're writing it one way or another
Ethan: Fine
AlmightyMithicB: Thank you finally
Ethan You're Welcome (Reference to Blue replacement)

(I hoped you liked it and I forgot to say this is non cannon but now here's fanart as them as heathers)
(Credit to all the artists)

Ethan and Kathryn so adorable

That's just hilarious

Jack is cinnamon roll Heather M in this

Dead Girl Walking as Ethan

Their little bows and scrunchies. ❤️  Candy Store one of my faves and the outfits are perfect too.