Rule: Under the possession rule, after the tenant obtains possession. he retains the property exclusively until the lease expires, unless the lease states otherwise. For example: Under the covenant of quiet enjoyment, the landlord promises that during the lease term, neither the landlord nor anyone having a superior title to the property will disturb the tenant's use and enjoyment of the property. This covenant forms the essence of the landlord-tenant relationship, and if it is breached, the tenant can terminate the lease and sue for damages. Conclusion: The lease agreement between James and Juan contains an express covenant of quiet enjoyment. In this case. James leased the top two stories to the club, which interfered Juan's business. James, as a landlord failed to perform a duty that the lease required [covenant of quiet enjoyment]. Thereby, he made difcult or impossible the Juan's use and enjoyment of the property. Juan can terminate the lease and sue for damages. This will lead to constructive eviction and consequently James should be held liable