BL - Sex Friends

Ch. 1-3, 6.2: After being confessed to by his younger, expressionless coworker Robo, Azuma, a sex service addict, refuses. But, after having sex and seeing another side of Robo, Azuma agrees to being sex friends.

Ch. 6: Sex friends breaks up once one of them gets a boyfriend, but when the other start a serious relationship he's invited to the hotel again

Ch. 1: Nanami has several sex friends, but Kazuma is the one he sees regularly. When Kazuma brings his twin brother Shoma for a threesome, Shoma falls for Nanami

Ch. 1-2,6.1: Promiscuous Asai never does it with the same guy twice. But after having a fling with a stranger in the train station bathroom, he's no longer interested in other guys

Ch. 5: Aki and Ryouma have been living together as sex friends for 5 years after meeting at a pub. When Aki's uncle asks Ryouma, his only employee after being introduced by Aki, to inherit his restaurant, Ryouma wants to break-up with Aki.

Ch. 2-3: Director Ogura discovers his subordinate Takeuchi cheated with his wife. As punishment, he makes Takeuchi wear the lingerie he gifted to her while Ogura violates him. But, this is actually just an elaborate roleplay.

Once or twice a month, Tatsumi violently takes out his frustration of being the secretary of his endearing, but hopeless young master Ryouma on nail artist Miki. Though Tatsumi initially chose Miki due to his resemblance to Ryouma, eventually it's Miki he's drawn to.

Ch. 2: Lonely with nowhere to belong, Saitou approaches his classmate Saitou Kazuki, who has a similar, lonely situation to him, asking Saitou to buy him and saying he'll buy Saitou too. The two begin a relationship based on buying each other.

Logan and Daniel are childhood friends. When Daniel finds out Logan is a virgin that hasn't even had his first kiss, he offers to help Logan out by becoming his kissing practice partner. Logan initially rejects Daniel's offer, but ends up agreeing. After kissing Daniel, Logan is affected more than he thought he'd be and begins looking at Daniel differently. However, Daniel is only using Logan as a replacement for his long-time, one-sided love, Logan's father.

Hino has always been popular with women, but has secretly loved antisocial Yaku since high school. 2 years after following Yaku to college, Hino still hasn't been able to even become friends with him. One day, after a drinking party, jealous that Yaku went despite declining every time Hino asked him, Hino hits on Yaku and the two have sex. However, Hino is, once again, unable to confess, after finding out Yaku is only interested in having sex friends. So, that's what Hino settles on being.