Her heart troubled by her boyfriend, she is kind by nature but indecisive and timid, dissatisfied with her own lack of assertiveness. One day, she finally snaps—watching strong-willed Kokoro berate Kotetsu, she abandons them both and walks away. Seeing Kotetsu so dejected, Iroha feels pity and comforts him. That's when Kotetsu reveals he grew up without a mother and has never known a mother's love. Touched by his gentleness, guilt over Kokoro's harsh words, and his longing for maternal affection, Iroha's maternal instincts begin to awaken. She finds pleasure in being leaned on, and gradually, their bond deepens into mutual attraction. Yet Kotetsu resolves to break up with Kokoro. Faced with his decision, Iroha takes a bold step—her twisted affection driving them into intense, passionate sex. A complex love story where tangled emotions lead to creampie-filled intimacy.