Iwaihime

A long-standing tradition among the Susuhara family dictates that male members, upon reaching a specific age, must leave home and live independently until they are recognized. The main character, a high school student, has already left and is adjusting well to his new life. He encounters Toe Kurokami, a mysterious girl who carries what looks like a Japanese doll. The doll's hair seems to grow, and it appears to whisper to her. The protagonist believes that meeting her may be part of his fate.