The birthday of Kotaro (Kanta Sato) is coming soon. Asako (Yuno Ohara) couldn't stop sweating because she was thinking too much about what the present was, but Kotaro made an unexpected suggestion, 'I want to go on a trip together.' And the two decided to open up their in-house romance. Asako immediately submitted a paid holiday notice to her director Okura (Mansaku Ikeuchi) stating 'Reason: Traveling with a lover' ...!? !! Kotaro makes a 'suggestion' on the sweet night of two people climbing the stairs of adults little by little, and on their best birthday, but Asako reacts unexpectedly-?!