Chapter 12
Mutsumi, a poor college student, takes on a shady but well-paying job as a toy tester, only to find out that the toys in question are exclusively for adults! His employers are a pair of handsome studs from his college, Kamishiro and Takase. Despite it being Mutsumi's first time, they test all sorts of toys on him, in various situations...
Chapter 5.5
It's Yuzuru's last year of high school, and he still doesn't have any friends. In fact, he's almost invisible to everyone's eyes... The people who do notice him even call him "Ghosty." One day, he becomes friends with one of the most popular kids in school, Kyoya. But, Kyoya's idea of friendship isn't exactly what Yuzuru expected... While Yuzuru struggles with this new-found "friendship," he realizes that behind all his popularity, Kyoya feels alone, too. The two opposites are soon drawn to each other as they see that they actually do have some things in common... A cute high school love story between the popular kid and a "ghost."