Nerve (1975)

Paratchanee, a young writer who often thinks she lacks life experience, lives with Anan, a wealthy husband who suffers from illnesses. One day, Netiya, a wealthy widow who has just been released from a mental hospital, comes to relax at the couple's house in Pattaya with her younger brother, Nop, a painter. However, Oranong, a bar singer who is Nop's girlfriend, comes to harass him here. When the fragile feelings of people who yearn for what they are missing come face to face, the story escalates beyond expectations.