After attending their colleague Tamura's wedding, Tateishi and Mitsuya walk home together. They begin to talk about their relationship before they started dating and reminisce. At the beginning of their careers, the two were known for being like cats and dogs, but after training, they gradually grew closer and ended up spending their days off together. One day, they go to a pastry fair. When a vendor mistakes them for a couple, an embarrassed Tateishi denies it, saying, "We're just colleagues." Hearing this, Mitsuya wears a somewhat sad expression... From "just colleagues" to "lovers." The beginning of their romance, the truth is now revealed—!