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Mother Maki decided to go on a hot spring trip with her beloved son Kazuya. It was a sexual education trip for just the two of us to treat my son, who is usually very spoiled and never leaves his mother's side, as a full-fledged man. A son who keeps sucking his favorite mother's breasts. Maki is nailed to Kazuya's phallus, which has become splendid, and is conscious as a man, leading him to sexual education guidance.