I can read these mangas many times! I rate them >9.5/10 based on my own preferences, so there will be lots of non-mainstream BL
Genres: NO PWP, no doujinshi
Length: <100 chapters or 3 vols
Search by tags: http://www.mangago.me/home/people/12706/manga/1/
If you like this list, please click "RECOMMEND". Thank you XD
2nd list: http://www.mangago.me/home/mangalist/655038/
3rd list: https://www.mangago.me/home/mangalist/3746699/
(IF 1ST LIST IS FULL, I'LL MOVE OLDER ONES TO MY LIST 2&3)
-Child Protagonist
-Family Life
-Family Love
-Babysitter, Nanny, Childcare
-Adopted Child
-Father-Daughter Relationship
-Father-Son Relationship
-Mother-Daughter Relationship
-Mother-Son Relationship
-Stepmother-Stepdaughter Relationship
-Stepmother-Stepson Relationship
-Aunt-Nephew Relationship
-Uncle-Niece Relationship
-Brother-Sister Relationship
PART 1:https://www.mangago.me/home/mangalist/395562/
PART 2:https://www.mangago.me/home/mangalist/2791570/
-Child Protagonist
-Family Life
-Family Love
-Babysitter, Nanny, Childcare
-Adopted Child
-Father-Daughter Relationship
-Father-Son Relationship
-Mother-Daughter Relationship
-Mother-Son Relationship
-Stepmother-Stepdaughter Relationship
-Stepmother-Stepson Relationship
-Aunt-Nephew Relationship
-Uncle-Niece Relationship
-Brother-Sister Relationship
PART 1:https://www.mangago.me/home/mangalist/395562/
PART 3:https://www.mangago.me/home/mangalist/3027252/
-Child Protagonist
-Family Life
-Family Love
-Babysitter, Nanny, Childcare
-Adopted Child
-Father-Daughter Relationship
-Father-Son Relationship
-Mother-Daughter Relationship
-Mother-Son Relationship
-Stepmother-Stepdaughter Relationship
-Stepmother-Stepson Relationship
-Aunt-Nephew Relationship
-Uncle-Niece Relationship
-Brother-Sister Relationship
PART 1:https://www.mangago.me/home/mangalist/395562/
PART 3:https://www.mangago.me/home/mangalist/3027252/