GetBackers, Volume 1

The job of a retriever is not a very lucrative one, at least not for Ginji Amano and Ban Mido. So dire are their circumstances that death by starvation seems imminent until a homeless man takes pity on them and shares some of the food he's been able to scrounge. Upon learning that they are the GetBackers, he offers them all he has to get his daughter back from the Yakuza.