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The second son who gets into the futon of Saya, who is taking a nap. The mother's second son seeks a mother like a daily routine. One day, when Saya gets out of the bath, her underwear is nowhere to be found. Saya thought it was her second son's work, but the one who appeared was her eldest son, clutching Saya's panties. After that, the second son sees the eldest son enter the sleeping Saya and goes mad with jealousy...