One of the only rules provided to them in order to complete their mission was that they absolutely could not pick the shaman kid. (Gaara/OC)
Ichigo just wants to do something nice for his girlfriend. (ichihime)
Orihime has accepted that her boundaries will never be respected, but Ichigo is too good of a friend to allow that. (ichihime)
It seemed like a practical arrangement. Who would say no to it? (itakugi)