It's an anthology show, with two stories per episode. Each first half is a comedy, followed by a gentler story with two people who've known each other since childhood.
It's also rather good. The comedy's light rather than side-splitting, but it's still entertaining.
A grumpy git's visited by a door-to-door saleslady. He tries to shut the door in her face, but she pushes her boobs in the way and forces her way into his flat. She's selling a sexual performance drug. He says he's too poor to buy something dodgy like that, but she pours it down his throat anyway, then gives him a demonstration of its efficacy.
Afterwards: "uhh.. I signed up for the subscription in the end. And there's a 500,000 cancellation penalty. No matter how you look at it, this is questionable!"
The doorbell rings.
Uh, jeez, who is it?
"May I take some of your time?"
Six girls are at the door.
The doorbell rings. Six more girls are brightly waiting there. "Once a sneaky salesperson gets a sale from you, others in the same industry will know and you'll get pestered by more every day!"
"I have a childhood friend who's ten years younger, called Chizuru." Unfortunately, her body's delicate and she was often hospitalised. Now, he's meeting Chizuru again for the first time in years.
This one's romantic.
Seo had always been a loner until two female classmates (Yui and Megu) pull him out of his shell. "I can't start conversations, I've always been transferring schools..." They then learn that he's never had a girlfriend and take intimate action. It later turns out that their public-spiritedness extends to helping other students.
"She wants to get rid of her virginity but she has no boyfriend. When we told her about you, she said she wants to do it with you. That'll be fine, right?"
This continues. Eventually there's a queue. Literally. A dozen girls are in the infimary to see him.
Masa-kun's been in love with his childhood friend Minori for ages now. She asks him to become her regular masturbation assistant, which he does, but ironically this doesn't help bring them together as people. As an experiment, he talks her into a week's abstinence, with impressive results.
It's kinkier and more sex-driven than 1b, but still ultimately romantic in its way. "We are now in a relationship where we both take care of each other's ejaculation and squirting."