imo it should last for 2-4 weeks so that they can get full effects on what it would be like as a cotb..Also i think that they should be able to keep the k because they braved a lot becoming cotb.
imo it should last for 2-4 weeks so that they can get full effects on what it would be like as a cotb..Also i think that they should be able to keep the k because they braved a lot becoming cotb.