After a cold open involving Hirotaka and Kabakura being photographed doing BL roleplay, we rewind to Narumi and Hirotaka both forgetting their umbrellas, despite being adults. Kabakura isn’t worried about any of his effects getting wet, so lends them his umbrella.
Hirotaka switches both the side he’s on (so she doesn’t get splashed by cars) and the position of his bag so smoothly, Narumi takes note of it in her inner monologue, and it’s further evidence he’s legit boyfriend material. Meanwhile a soaking wet Kabakura encounters Koyanagi and asks if she’ll share her umbrella, and rather than say he gave his to their friends, he says he forgot it, and gets doted on by a concerned Koyanagi.
For her part, Koyanagi professes her hatred for rainy days because her shoes get wet, but when she invites herself to Kabakura’s for dinner and he invites her to spend the night, she professes her love for rainy days. So basically, she and rain are like Asuka and Shinji.
Then we see why Hirotaka and Kabakura were posing like would-be lovers: to cheer up Narumi. Hirotaka can sense something’s up, but Narumi is being all coy with false smiles and “it’s nothing really, don’t worry about it.”
Finally, Hirotaka waits for her after work and continues to pursue the issue, going so far as to ask if he’s “so undependable” she can’t tell him what’s up. Finally, she relents, and it turns out to be nothing; a character in a manga she (and Kabakura) liked died.
If it were something genuinely troubling, would Narumi have told him? I like to think so, but even not, sometimes it pays to be persistent when someone is trying to spare you trouble or worry…and in this case, Hirotaka already was worried.
Finally, Christmas approaches. There’s talk of Santa and when Narumi, Hirotaka, and Naoya stopped believing in him. Nao, in a thin and much-less-warm-than-it-looks Santa costume handing out free coffee outside Starbucks, states that he never stopped believing in Santa; his definition of who it was simply shifted to anyone you love or are connected with who makes you happy. Narumi praises Nao as a saint.
Last year’s Christmas was The Worst for Koyanagi. Sure, she had plenty of time to make a wicked awesome costume, but the reason she had that time is that Kabakura spent the holiday working his ass off, and they didn’t even speak to each other until the new year had some.
This year Koyanagi assumes it will be more of the same, and that she simply has to make peace with the fact her boyfriend is a workaholic. But as office elevator doors close, Kabakura suddenly teleports from his desk to the doors, forcing them open and joining Koyanagi.
He ends up taking her to a super fancy and exclusive restaurant, the reservations for which he made over a half-year ago, and the cost of which he worked extra hours to afford. Koyanagi, appreciative of his efforts, presents him with the gift of a limited-edition event item.
Hirotaka and Narumi stay in for Christmas Eve, eating takeout, drinking beer and wine, and playing video games together. Both couples look like they’re having nice Christmases.