Ifrit on deviant art is doing a event where you vote to level up a girl in different ways, one of them being growing a bigger butt.
http://ifrit9.deviantart.com/art/Gir...set=0#comments
Might be in some peoples interest
Uppdate Here is a link to the latest, so you can vote there.
http://ifrit9.deviantart.com/art/Gir...-012-463464972 closed
Will update with the latest one under here when ifrit releases them
http://www.deviantart.com/art/Girl-M...-013-463830587 closed
http://ifrit9.deviantart.com/art/Gir...-014-464318393 closed
http://ifrit9.deviantart.com/art/Gir...-017-466761063 new