In a household filled with love for their daughter and son-in-law, Iroha eagerly awaits the arrival of her grandchild. After dinner, slightly tipsy, she enjoys a gentle shoulder massage from her daughter's husband as they spend warm, intimate moments together. Touched by his kindness, Iroha murmurs, "If only my husband were like him." The next day, while her daughter is away at a routine checkup, the son-in-law visits and sincerely brings up their previous conversation. Flustered, Iroha blames herself for letting things go this far. When he says, "When someone as beautiful as you says that, I can't help but take it seriously," her heart races uncontrollably. As he pulls her into an embrace, she weakly protests, "No, this is wrong," yet makes no real attempt to stop him. As he caresses her body, she feels overwhelming pleasure but remains silent. Then, he exposes himself, revealing his hardened cock directly in front of her. Unable to resist any longer, Iroha reaches out and takes the burning shaft into her mouth. Her suppressed passion finally begins to awaken this night.