Xin Datou Er Zi He Xiao Tou Baba 5: Wo de Wai Xing Pengyou

Big Head Son dreams of becoming a young astronaut, but repeated setbacks during a selection program begin to shake his confidence. Wanting to guide him without simply solving every problem for him, Small Head Dad secretly disguises himself as an alien and becomes his unusual private coach.

Alongside Marshmallow, Big Head Son faces a series of space-themed challenges that demand more than enthusiasm. Through failure, teamwork, and a moment when he chooses the safety of others over his own success, he gradually discovers that the spirit of exploration is built on responsibility as much as courage.