Totally exhausted from many days overtime work, Naoto Kuroiwa, advertisement salesman (as well as a corporate slave) goes to Kishibe Chiropractic Lab following his colleague's recommendation. It has high reputation and the doctor, Kazuma Kishibe is a young handsome man of the same age with Kuroiwa. With his too much friendliness and proactivity, Kuroiwa is overwhelmed first, but the technique of chiropractic is fantastic and he feels too good like in heaven. "I'll make you...feel so good that you'll positively melt." Skillful handlings and accurate finger pressures make him sleep until next morning. Kuroiwa starts going to the lab but the doctor's treatment becomes more and more sexually aroused and at the same time, Kuroiwa feels more and more unable to resist as if his body has been changed from deep inside. When he finds that Kishibe avoids touching his right shoulder where he injured at the baseball team in his youth, Kishibe's true character begins to show up. 
 
(Source: Takeshobo)
 
Note: Includes one extra chapter.

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