The Debt Collector Who’s an Older Girl Takes Care of Me Little by Littleだんだん、借金取りの姉御がボクの世話を焼いてくれる; Dandan, Shakkintori no Anego ga Boku no Sewa o Yaite Kureru; La chica cobradora me cuida poco a poco.

A collector girl finds a child while collecting a debt: his parents have escaped to avoid paying and now she is in charge of keeping him safe and taking care of him... everything to protect him rewards, everything for that!