A Tale of Rascal (1999)

Mou (NG Kei-lung) is a homeless teenager. One day a litter girl sticks to him. Mou accidentally fought with a group of guys who are filming movies. He became one of the replacements in the movie and meet actress Gigi TSUI (TSUI Yuk-suen). With Gigi's help, Mou has the chance to go back to school on agreement that he can be the Top 5 in the class. However, it is a hard job for Mou who hates lessons. He takes the short cut by dating the principal's daughter Icy and cheating in the examination. He was at the top of the class and got the love from Gigi but his plan has been unveiled by Icy. Then Mou falls to a life where his daily life is just the duplication of his yesterday...

Unfortunately the movie A Tale of Rascal is not yet available on HBO Max.