Younger Sister (1974)

Plot

Neri, Akio's younger sister, finds herself single after parting ways with her boyfriend in Kamakura. Seeking solace, she relocates to her brother's home. Complicating matters, Eiko, the sister of Neri’s ex, visits to confront her feelings about the breakup, suspecting her presence might have influenced the split since the trio once shared a living space. Meanwhile, Eiko's brother has mysteriously vanished, adding an air of tension and unresolved emotions to the already complicated situation among the intertwined lives of the siblings.