Summary
Kazuya is a 28 year-old divorced salaryman, who is convinced by his boss one night to go with him to a massage parlor. He does and meets a pretty young woman named Nagisa. He takes her card, but loses it when his aunt makes him help clean up the house in the front of the complex they live in (shes the landlord) so that a new boarder can come live with them.
Of course, its Nagisa, and her 5 children, from toddler to teenager. Her husband has died and shes doing everything she can to support these kids. Oh, and one more thing. Shes only 21 years old, and may have never even consummated her marriage!
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