Sonezaki Keiichi is popular... Too popular for his own good. Too popular for his own peace of mind. He hates it. He hates how most people look at him once and fall head over heels for him. The rest of them just hate him for that popularity. So he keeps to himself and only complains to his brother, Megumi. Until one day Megumi invites Takamiya Natsuki home. Just like the others, Natsuki's face shows the same expression of falling for Keiichi. But somehow, that look gives Keiichi goosebumps, rather than makes him sick. What is this? Why is that? He is baffled by it, so he sets out to find the answers!

Noboru seems to have rotten luck at school when it comes to girls, because they all have eyes only for Yuuki, the resident Prince Charming. Tall, dark, rich and handsome Yuuki seems to be the exact opposite of the poor, short and not very manly Noboru. Because Noboru is from a poor family, he had to work extra hard just to get into this prestigious Seihou Academy, which is mainly reserved for the rich and elites of society. Before admittance, it was a dream of Noburo's to hook up with one of the rich girls at Seihou Academy, but his plans seem to have gone awry, especially since all the girls seems to not pay him much attention while doting on Yuuki the most. But for some reason, why does this drop-dead gorgeous hunk, Yuuki, seem to want to get close to him?

After graduating from a university in Tokyo, Chiharu returns to his family home, a hot spring inn. As the only son, it is his destiny to become the heir of the inn, but being bad at communication makes it difficult for him to fulfil the responsibility. One day, he encounters a famous college judo player named Sonoda, who comes to stay at the inn for rehabilitation. Sonoda is a polite man, and he doesn't look down on Chiharu for being bad at communication. Chiharu feels at ease around Sonoda, until one day Sonoda asks him, "Do you like men?" What should Chiharu answer to that?!

Volume 1: Chintsubu A Part 1 – Iwabuchi starts hanging out with girls from his cram school, and Kamiya-chinko freaks out. What is he up to? Part 2 – Toride's soul moves up to Ayase's nipple. Volume 2: Chintsubu B When Iwabuchi engages in more chinko cosplay, Kamiya is upset and they get into another fight. The cosplay chinkos are not to be missed in this! Volume 3: Chintsubu C Part 1 – The chinkos are having a big discussion over what to do when they want to get off and their "bodies" don't. Part 2 – Gives us the backstory on Iwabuchi's first impressions of Kamiya, when they first met long before the accident. Volume 4: Chintsubu D Kamiya injures his hand and can't engage in mutual jerking off with Iwabuchi, leading to a REALLY big fight. Volume 5: Chintsubu E It's summer and the chinko alliance head to the pool for some swimming fun, but can chinkos even swim? Volume 6: Chintsubu F When Toride-chinko disappears one night, Ayase panics. The next morning, Hiro reveals that he has performed a successful remote exorcism on Toride-chinko, but when Toride-kun shows up at school with no memory of Ayase or the chinbi (chinko secret), Ayase tries to be optimistic about making Toride-kun fall for him all over again. What happened to Toride-chinko? Is he gone for good? Will Toride remember the chinbi and his feelings for Ayase? Volume 7: Chintsubu G In this installment of Chintsubu, Toride must come to terms with the fact that his chinko talks – and that it's fixated on Ayase. Ayase struggles to resurrect Toride's memories the only way he knows how: by working some hand magic on Toride-chinko. Unfortunately, he fails his mission and freaks Toride out in the process. Will Toride-kun be able to accept his wacky anatomy as anything other than a strange hallucination? Will he find the courage to talk to Ayase again, or will his fear of his over-excited appendage keep him down? This couple's drama gives Kamiya plenty of food for thought regarding his own relationship with Iwabuchi.

While on a high school field trip, a school bus crashes into the shrine of a penis God. This serves as the catalyst for a group of four high school boys to switch penises with each other.

Yoshiki works as a delivery boy for a noodle shop and every day he delivers to a customer by the name of Nogi, who treats him like a personal maid and annoys him. When Yoshiki's parents decide to remodel the shop, they call Nogi, and this is Yoshiki's chance to get revenge by being a demanding customer and giving Nogi a taste of his own medicine!

Haruhiko has just been confided by his friend, Kyotarou, that he is seeing someone. That "significant other" turns out to be Nao, a young elementary school boy. Nao's mother died when he was younger and the only person taking care of him is his dad, Hirofumi. Scared that Hirofumi might find out about their relationship, Kyotarou asks Haruhiko to tag along on their outings in order to conceal the relationship from Hirofumi. Haruhiko reluctantly agrees but what he hadn't expected was to develop feelings for Nao's father.

Collection of oneshots (a main story and a sequel + 6 oneshots, mostly shota)

A physically overgrown, dedicated to sports yet mentally immature college student finds love for the first time.

Komori Tadamachi loves teaching at an elementary school, the only problem is fellow teacher Takigawa Kyou. Always being compared to the perfectly composed and devastatingly handsome Takigawa is really destroying Komori's self-esteem. Still, Komori finds himself being drawn in by Takigawa's effortless charm…

Touji's daily routine consists of cooking, doing laundry, and cleaning… Before he knew it, he had become like a househusband, taking care of his extended family, the Udagawas. One day, Touji's cousin Yuuto joins the family and Touji cannot take his eyes off the innocent Yuuto. He even has erotic thoughts about Yuuto. With his feelings spinning out of control, what will happen to this Itokon?!

Noboru and Yuuki explore the sexual side of their relationship.

Kazuha, a naïve boy from the countryside, dreamed about working under Hongou, who manages a restaurant in Tokyo. After cheerfully arriving in Tokyo, what awaits is a person who is totally different from the person he admires. Hongou never hides his temper and is a super selfish guy! While disregarding Kazuha's uneasiness, Hongou made Kazuha live with him?!

Chiba is a "convenience man" who meets Aki Kirigaya while on a job. Chiba's job is to become Kirigaya's friend. After becoming friends, Kirigaya refuses to see him. What is Chiba to do?