Sudai Takashi, an employee at a confectionery company, receives a promotion after three years alongside his new colleague, the reserved and introverted Kobayashi Chikako. Kobayashi, who conceals her chest due to past troubles, struggles to socialize. Determined to transform her outlook, Sudai embarks on a journey that may lead to unexpected emotions blossoming between them. Originally shared on the author's Twitter in 2017, this tale, initially titled 'Jimi Joshi x Osekkai Danshi,' debuted on Nico Nico Seiga before transitioning to Manga UP! in 2019, featuring three bonus chapters.