Salaryman Masunaga hates playboy coworker Kuge, but after Kuge help Masunaga complete a frantic last-minute project Masunaga collapses from exhaustion and Kuge takes him to his apartment. They end up in a sexual relationship that's pretty steamy and Kuge goes from being a grumpy playboy to really cute and adoringly devoted. But heartbreak lies ahead when Masunaga breaks up with Kuge after overhearing his sister badmouth their relationship.