Double Mints(2009)

"I've killed a woman." The overbearing voice on the phone was that of a high school classmate named mitsuo ichikawa. Buried memories from the past resurface within the heart of a man who carries the same name, Mitsuo Ichikawa. Events drag him right back into the passions of the past. The two reunite as accomplices, yet their relationship as master and servant slowly changes into something different...

(Source: DMG)