Phoo Chai Hua Jai Mai Pie Rua(1995)

Original title: ผู้ชายหัวใจไม่พายเรือ

Rud is in love with Valai but is afraid to tell her. He has bought an old ancient ring intending to give it to Valai as a birthday gift but he never gets the opportunity to give it to her, so he wears it on his finger but is unable to take it off. The next morning, a miracle happens to him when he wakes up and finds himself turned into a pretty woman, but when the night falls he turned back to himself again.