Renting A Rented Flat Haram?

Assalamualaikum Brothers and Sisters. So it works out like this, someone needed an X amount of money and own a flat so he decided to give it to me for a year so I can have the rent for a year and then end of the year he will get back his flat and i will get my money back. Theres no extra money or interest involved (meaning the rent payer will not have his rent increased or have their contract changed in anyway). Its a simple ethical trade. Is that considered haram? Thank you