Salaryman Suzume Toujou is taking a moment for himself in the office, making a list of things he wants to do before his rapidly-approaching 40th birthday. Unbeknownst to Suzume, his coworker Keishi Tanaka notices the most recent item he added to the list—find a lover. Much to Suzume's surprise, Keishi informs him that he already knows that Suzume is gay, and volunteers to fill that role. As the two end up gradually checking off the list together, Suzume wonders whether Keishi is serious about their relationship or if this is just a playful diversion.