After divorcing her husband and being separated from her only son, Yuki, for a long time, mother Maya Takeuchi finds herself living with him again due to her ex-husband's remarriage. Forced once more into the role of caretaker, Maya acts awkwardly toward Yuki, burdened by lingering guilt from the past. Now reaching adolescence, Yuki begins to see his beautiful mother as a woman, causing inner turmoil to grow deeper within him. Unable to suppress his feelings any longer, he finally takes action...