Thirty-year-old office worker Hanae has no relationship experience — until she finds herself alone with intern Tanokura during a company night out.

Hanae asks Tanokura to keep what happened between them a secret, but he presses her for a reply to his question. Later, Hitomi makes a move on Asao.

A meddling comment from Asao makes Hanae worry about becoming a burdensome partner. She prepares to spend the night at Tanokura's place.

When Hanae runs into Tanokura's old friend Hirono at the dentist, Hirono reveals her own romantic interest in Tanokura and begins asking for advice.

Going through a rough patch with Tanokura, Hanae agonizes over signs that he might be losing interest in her. Kagami tries his luck with Hitomi.

To rehearse living together, Hanae asks Tanokura if she can stay at his apartment for a few nights in a row. Asao reenters Hanae's professional life.

Hanae fears Oshiro will tell her coworkers about her relationship with Tanokura. She also feels uneasy about Tanokura's life plans after college.

Following a short stay at a hot spring resort with Tanokura, Hanae thinks about how she can make him happy despite changing the course of his future.

After her breakup with Tanokura and unexpected proposal from Asao, Hanae wonders what it means to fall in love. Tanokura sends her a sincere message.