Rule 34 Dev - animated animated_gif arms_up artist_request beach bikini black_hair brown_eyes child child_only copyright_request fetal_movement kaguya-sama_wa_kokurasetai_~tensai-tachi_no_renai_zunousen~ moving navel pregnant_child pregnant_loli ready_to_pop shinomiya_kaguya shirt stomach_bulge swimsuit white_shirt|3826671324