In the single-mother household of the Sasayama family, daily life continues with an unhealed grief over the loss of the father. Both mother and son remain unable to recover from their emotional wounds. The son has become a shut-in, completely dependent on his mother—the only family he has left—constantly staying by her side. The mother reciprocates his need, and together they support each other, trying to come to terms with the father's death. Their mother-son bond grows deeper, becoming a source of strength to overcome their shared suffering.