Key legal question
Whether the initial rent was abusive and should be set according to comparable rents.
Extracted holding
The landlord failed to prove that the agreed rent fell within the usual local or neighborhood rents; the rent was therefore upheld at the previous tenant's level.
Extracted reasoning
Comparable-rent analysis under Art. 269a let. a CO and Art. 11 OBLF required at least five suitable comparables; the cantonal court could exclude several proposed examples, and the landlord did not show any federal-law error in doing so.