Aya becomes depressed when she finds out that her other sisters have already made a move on her beloved elder-brother before she gets a chance to. Will she be able to win him over instead?

Keiichi is a young man that lives with his two younger sisters, Ririna and Momoka. While their parents are out of town for the entire summer vacation, Keiichi discovers Ririna’s vibrator in the bathroom. She agrees to do anything he wants in exchange for keeping quiet about it.

Nene-san confides in Tomoya over drinks, telling him she doesn’t think she has what it takes for her job because no one takes her seriously. He comes up with a plan to help her, to be implemented at the next trial distribution event. After all, if she can overcome her pleasure while she has vibrators in both parts of her, she can do anything, right? Later, when Kisara takes over, Tomoya takes exception to her fake attitude and gives her a surprise! Then Iori surprises him in the men’s toilet; she’s been having trouble with a defecation scene, so she wants his help. What can he do but fill her request? (Warning: scat content.) But turnabout’s fair play, and Reina-chan’s ‘date’ puts Tomoya on the spot. Can he endure?

Mochizuki Tomoya is the newly-hired member of Flower, an H-game company that’s about to go bankrupt. In an attempt to step up their game, he teaches the all-female team of virgins everything he knows about sex. Because of this, artist Kisara-san and scenario writer Momoka-chan have both developed feelings for him. And as far as they’re concerned, there’s only one way to make him commit: a sex competition!

A look back before their game was completed. Momoka gets Tomoya to help her one on one. Tomoya had hoped that he and Momoka would get along better because of it, but when that’s not the case, he decides to play a prank on her.