Unfortunately it is too late for me: My brain still cannot help but act like the very word "amogus" is the funniest thing ever even after the meme has mostly fallen from favor; the damage is done.
Maybe Size difference or (Soft) Vore kink?
What's vore
Bocchi the Cat!
Bocchi
This would be so cool.
This is basically Zari and Charlie from Legends of Tomorrow
Please also tint the window so nobody can see me
A one way mirror would probably work as well.
Additionally, it would literally work since the inside of the backpack is much darker than the outside.