Yutako Yamazaki, an unremarkable office worker, experiences a dramatic shift in her quiet existence when Yukiharu Okudera, a member of the Okudera-gumi gang, falls head over heels for her upon retrieving her lost glasses. Despite her initial rejection of his sudden marriage proposal, his sincerity intrigues her, leading to an exchange of contact details. As Yukiharu persistently pursues Yutako, her initial fear gives way to enjoyment, eventually leading her heart astray. However, their budding connection faces jeopardy when enemies of Yukiharu target her for an attack.