Yutaka's really insecure about being pigeon-chested, so he decides to go to a stretch gym his colleague recommends. He tells himself this is for his health, so he can keep eating sugary sweets, and to get rid of his pigeon chest once and for all! A motivated Yutaka goes to the gym and finds himself in front of the super buff stretch trainer Asami who's going to teach him how to stretch… except Asami morphs into a different person as soon as he sees and touches Yutaka's chest!! Apparently, Asami is gay and has a fetish for men's chests, and Yutaka's is the best!! Asami totally exploits his position as a trainer and helps himself to Yutaka's perfect chest…!!