I recently noticed the title for the anime 「[彼女]{かのじょ}、お[借]{か}りします」 uses the verb 「借りる」.
It is well known that it is a ichidan verb and the expect inflection is 「借ります」, but in the anime title it is seen as 「借りします」.
What function does the extra 「し」 provide and more importantly, why is added?