Sugar Is Not Sweet (1965)

Chaokun Jaroenkesa, the owner of 'Kesajaroen', a shop that sells hair loss treatment, wants to pay back his debt of kindness to his dear Indian friend, whose formula is responsible for the company's prosperity, by hiring Manas, his good-for-nothing son, to marry Nam Tan (Sugar), the daughter of his dear friend, for two-million baht.