下课以后我就没有什么事儿 - 就 для чего?

[Адов]

>>>

2017.01.28Зылоле Сразу после уроков

就 здесь просто "после", значения "cразу" нет.

https://en.wiktionary.org/wiki/就
12. then
我做完就会告诉你。I will tell you when I have finished.

NOT "I will tell you immediately when I have finished."

Мой пример:
我做完功課就有空。I will be free after finishing my homework.
NOT I will be free immediately after finishing my homework.

"сразу после" будет "一…就…" или в контексте.