Living with her boyfriend, who joined her at the same time as her, and being a team leader in the planning department, Masumi was living a smooth life. However, one day, a slightly chubby girl named Madoka joined the company mid-career and became her subordinate, and Masumi's peaceful life gradually fell apart. "I can't resist delicious food~♡" Madoka, who is loyal to both her appetite and sexual desire, sets her sights on Masumi's boyfriend, Shuhei.