Ended up relying on your help with 〜てしまう

警察官(けいさつか):

「さあ、さっさと歩(ある)け！！」

“Come on, hurry up and walk!!”

目暮(めぐれ):

「いやー、また君(きみ)の力(ちから)を借(か)りてしまったな、工藤(くどう)君(くん)！！」

“Man, I ended up relying on your help again, Kudo!!”

Key Points

1. 借(か)りてしまった = ended up relying on

   • 君(きみ)の力(ちから)を借(か)りてしまった means Megure ended up borrowing Kudo’s help again.

   • Here 〜てしまった presents the help as something that happened completely and before Megure quite expected it, giving the line a delighted “you really came through for me again” feeling rather than regret.

2. 力(ちから)を借(か)りる is a set phrase

   • 力(ちから)を借(か)りる literally means “borrow someone’s strength”, but in context it means “rely on someone’s help” or “get someone’s assistance”.

   • The object marker を marks 君(きみ)の力(ちから) as the thing Megure borrowed.

3. また and な show pleased familiarity

   • また means “again”, implying this is not the first time Megure has needed Kudo’s help.

   • The sentence-ending な here is a self-directed, reflective ending, matching Megure’s warm satisfaction as he addresses Kudo.