Aishiteruze Baby★★, Kure-nai Recommendations
Both anime feature a high school student taking on the responsibility of a young child, though the circumstances of the child are different (and therefore lead to different storylines), the theme is present in both. So for this reason I suggest Kure-nai lovers to try out Aishiteruze Baby, especially if the relationship between carer and child is what appealed to you.
Both have to deal with their own miserable lives and a little girl's problems. Cute and simple.
They both are about kids who have been temporarily been abandoned by their parents and have to be taken care of by an older teenage boy! They both are good watches!
In both animes the main character ends up looking after a young girl, and a large portion of each focuses on family issues.
A young boy is swept up into taking care of his little cousin and show how they spend their days over the course of the year. There are some bullying and dark times to be had and they can be sad.
MC forced to take care of a child while trying to balance his love life and other problems.
Both series are about a teenager boy somehow raising a little girl.