Muteki na Okyakusama

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

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.

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?!

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!

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?

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.