I always describe it as a classic 'fake dating turns real' setup with a very specific wintery coziness. So the main story follows two coworkers, Himuro and Yukimura. She's this super-efficient, seemingly cold woman; he's the laid-back, kind-hearted guy everyone likes. On a whim, due to some office gossip about her being unapproachable, he suggests they pretend to date just to get people off her back. The plot is really about how their staged moments—sharing his handmade scarf, grabbing coffee together—start thawing her exterior and making him see there's a lot more warmth and vulnerability under her professional shell.
It's less about big dramatic twists and more about those small, quiet moments where the act starts feeling less like an act. You get scenes of them waiting for the train in the cold, or her secretly appreciating how he remembers she likes her tea. The central tension isn't will-they-won't-they, because you know they will; it's about watching two people who think they're just playing parts slowly realize they've built something genuinely comforting between them. The title, which asks if this love can warm you up, is the core question the story answers through all these little shared thermoses of coffee and whispered conversations.