Remember You (1987)

Shy Nina is still living with her grandmother in her mid-20s. The lovely grandmother gives her granddaughter a pile of money to finally make something of her life and hook up with a hot guy. That's what she does: she uses the money to make herself really chic. Meanwhile, Steve is crazy about the bombshell Kim, but at a party he falls in love with Nina and Kim is extremely jealous...

Unfortunately the movie Remember You is not yet available on HBO Max.