Byul from love is an illusion maybe
yaoi with kids that come to mind?
http://www.mangago.zone/read-manga/hinadori_wa_shiokaze_ni_madoromu/uu/hinadori_wa_shiokaze_ni_madoromu-chapter-1/9/
http://www.mangago.zone/read-manga/hinadori_wa_shiokaze_ni_madoromu/uu/hinadori_wa_shiokaze_ni_madoromu-chapter-2/50/
http://www.mangago.zone/read-manga/sekai_wa_shippo_de_dekiteiru/uu/sekai_wa_shippo_de_dekiteiru-chapter-1/4/
http://www.mangago.zone/read-manga/kedamono_arashi_kiss_me_baby/nhs/nhs_v-1-chapter-595428/7/
http://www.mangago.zone/read-manga/tadaima_okaeri/uu/tr_chapter-5/pg-3/
i feel like the child resembles someone but i can't remember who!!