tsk, tsk, tsk, Anon.
All you need is imagination, the possibilities are endless.
For example, how about an,alternative ending?>Hiro comes back with dead 02, walks out of space ship in slow motion while his black long sexy hair blows in the wind, revealing his battle scars.>Then a full body shot of his muscular chad body.>Ichigo is dripping wet.
But if alternative ending ain't up your alley. You could have hypnotism, Ichigo get hypnotized by some random faceless dude as self insert, so she thinks she's fucking Hiro, while Goro is out traveling the world unaware of whats happening.
You can play around with several ideas really, only your imagination is the limit.