I'll try to translate the character intros. Keep in mind that my translation might be not 100% correct though:
Top text:
A married couple with a sexless relationship (I don't understand if they are married for 6 years or are sexless for 6 years).
The wife wants a child but the economy of the house doesn't allow it.
The husband also wants to save some more money.
Cheerful and a little strong-willed wife
IWASE KAORI
Works in the supermarket three times a week
Has a bit of a tummy but persuades herself that's because of her age.
In her late thirties, she is the age of wanting to have a child,
but she doesn't tell her husband.
A little indecisive, go-with-the-flow main character
IWASE TATSUYA
Office worker of a small trade company with a low salary.
Gentle, sociable, and confrontational, but occasionally is also manly...?
Neat and tidy bitch wife (there's actually a Japanese word for this:
清楚系ビッチ)
KAYABE YUUNA
The wife of Manzou that moved next door.
Has a docile and gentle aura but contrary to her appearance she's greedy for sex.
Works at night to earn money instead of her husband.
Chubby insatiable man.
KAYABE MANZOU
Plump, gentle appearance. (maybe: gentle appearance because he's plump)
Even though the belly looks, he is greedy for sex and has a big cock.
A bad husband that doesn't work during the day.
*I translated it as "insatiable" but the word is zetsurin 絶倫. I'm sure you've heard it, but in hentai, it refers to a man that can do it several times in a row (usually not even losing erection after every ejaculation).