Responses
I'm not sure but this?
http://www.mangago.me/read-manga/bi_no_isu/an/bi-no-isu-chapter-4.html
I'm not sure but this?
http://www.mangago.me/read-manga/bi_no_isu/an/bi-no-isu-chapter-4.html
I think it was about a neighbor who a kid and he wanted to be a doctor or veterinarian and did his "practice" on the boy. That lasted a couple years.