Man, I get why you'd ask – the whole office romance setup in 'We Are in Love' feels so specific, doesn't it? Like you're almost waiting for an 'inspired by real events' tagline at the start. As far as I've been able to dig up, though, there's no official claim that it's directly based on a particular true story. It's more in the vein of drawing from universal real-life experiences. You know, that weird, tense energy between co-workers, the accidental eye-contact, the dread of a group chat blowing up over gossip. Those parts are definitely real.
The mangaka, Sakura Tsukuba, has a style that leans into hyper-realistic office dynamics and social anxiety, which might be what's giving you that 'based on a true story' vibe. It's less about documenting one specific couple and more about amplifying the small, excruciatingly awkward moments we've all probably had. I remember reading a volume and thinking, 'oh god, I've been in this exact Slack channel panic.' So in a way, it's 'true' because it's so painfully relatable, but no, not a literal biography.
It's funny, the parts that feel most 'true' to me are the side characters' reactions – the friends who are way too invested, the manager who definitely notices but pretends not to. That's the real gold.