Mei prioritizes her career over housework and relationships; she has little time for domestic tasks or dating; on her birthday, Mei discovers an unfamiliar man in her untidy apartment.

Despite his trial period having ended, Nagisa revisits Mei's apartment to return an item; Mei gets roped into drinks after work with Tadokoro.

After confessing to her mother about Nagisa and her inability to do housework, Mei tries proving to herself that she doesn't need a housekeeper.

Tadokoro discovers Mei is his neighbor and asks if she lives with a man; she responds by making up an awkward lie about Nagisa's identity.

Nagisa teaches Mei's mother cooking skills for Shigeru's 60th birthday; Mei forms a strategy to repair the relationship between Yui and their mother.

Tadokoro begins to question if Nagisa is really Mei's father; curious about Nagisa's private life, Mei decides to tail him when she spots him outside.