The father (German) and mother (South African) are unmarried parents of two minor sons, aged 10 and 8. They lived in Cape Town for about 15 years before relocating to Germany in March 2020 during the COVID-19 pandemic, taking advantage of German repatriation flights. After their relationship ended in August 2022, they shared care of the children in Germany. In February 2023, the mother went to South Africa to visit her ill father. The children later joined her with the father's accompaniment, arriving 30 March 2023 with return tickets to Germany for 20 April 2023. On 19 April 2023, the mother informed the father she intended to remain in South Africa and refused to return the children to Germany. The father immediately sought assistance, and the applicants launched proceedings under the Hague Convention for the children's return to Germany.