You're welcome! And you can also check those out.
http://www.mangago.zone/read-manga/u_don_t_know_me/
http://www.mangago.zone/read-manga/koi_wa_ina_mono_myouna_mono/
http://www.mangago.zone/read-manga/wild_rock/
http://www.mangago.zone/read-manga/yome_ni_konai_ka/mf/v02/c001/ (supporting grandfather and parents-in-law)
http://www.mangago.zone/read-manga/ushirokara_dakishimete/ (parents)
http://www.mangago.zone/read-manga/uchi_no_darling_gaikokujin/ (parents)
http://www.mangago.zone/read-manga/kanga_na_spoon/
They aren't kids, but the ending is happy, and the parents are good with it.
Please help me find another happy ending and family approval manga similiar like this
http://www.mangago.zone/read-manga/hana_no_migoro_ni/
ヾ(☆▽☆)