Mint tells a heartwarming and very human story about life and redemption. An aspiring editor tries to get an exclusive contract with a retired poet who is mourning the loss of his wife. As their relationship deepens, the editor comes to understand his sadness and determines to shepherd him back to happiness. Her cheerful character improves his mood, but she is later struck down by a serious illness. The poet calls on enchantment in his past to help her future.

Shiori’s husband decides not to attend a workshop they were supposed to join together. Shiori asks Junnosuke, a fill-in introduced by Shiori’s colleague, to join the workshop as her acting husband. Satisfied with Junnosuke, Shiori secretly rents an apartment and begins a pseudo-marital life with him.