Chapter 1
Namura Tsutomu has a special condition where due to calorie consumption, he gets a raging hard-on every time he eats. He gets help to cure his irregular erections from Kaiyama and Masaki of human research institute, who find his condition fascinating. Things continue like this until he meet the handsome heir, Shiga Haruka, whose gentle touch seems to help him.
Chapter 5.5
Renta: Sae is a college student who, for his own reasons, likes to wear bras. One day at the laundromat, he meets a mysterious man. At first, Sae has his guard up with the man, who seems to know a little too much about bras, but after a while, Sae learns that Akihiro Togyoku is a designer for Sunline, a brand of men's bras. The two have started getting close when Akihiro tells Sae he knows a special way to desensitize Sae's "pink little things"...!!