Busto was born in
Dos Hermanas,
Seville,
Andalusia, and joined
Real Betis' youth setup at the age of seven. After a loan spell to Calavera CF during the 2021–22 season, On 13 July 2023, Busto renewed his contract with Betis until 2025. He made his first team – and
La Liga – debut the following 13 January, replacing
Aitor Ruibal in a 1–0 home win over
Granada CF. ==International career==