The Fursona House

A house that sits on the edge of 2 separate realities.  It is said that anyone who stays at the house and has a fursona will become their fursona after 1 full week. During that week that person will only be able to interact with those who have lived in said house before for any indeterminate amount of time.  This can range from 1 hr to 6 of the 7 days.  If a person stops living there before the seven days have passed the house will cease to exist for them for at least a decade.  The house is always located in the same place but those who have left will be unable to perceive it with any senses.  If a person stays in said house for 7 days they will become their fursona (or Zootopia Sona for those idiots) and be transferred to a reality parallel to ours. Those without a fursona will be unaffected and will not see the house unless seen through peripherals.