PRE: I'm all in on this. Everyone's right about the "couple practical". It's a logic-defying plot contrivance of the sort that works only in broad comedy or lewd ero. And okay, the central romance is arguably a bit generic. Nevertheless, I was hooked in one chapter. So much so that I read 30 in a single sitting. That alone earns the gold seal of beep approval.
PRO I: The male and female leads are interesting in low-key, recognizably human ways, and the comfortable pacing gives us plenty of time to settle in with them. Events never feel too rushed or draggy, characters and relationships actually develop over time, and the writing doesn't use contrived obstacles to juice the drama.
PRO II: Though the mechanics of the couple practical are absurd, once they've been explained, it functions much like the "forced cohabitation" trope. As such, it serves the story well, compelling the oil & water protagonists to spend time together at least trying to get along. This allows their feelings to acquire complexity in a fairly natural fashion*.
CON: Jirou hedges & dithers like the male lead of every other romantic shounen/seinen manga**. And the secondary characters are completely disposable (including the catastrophically boring Shiori, who I hope will soon marry Minami, Mei, or her own damn hand). If you tossed out everything but the scenes of Akari and Jirou alone together, nothing important would be lost.
SUM: While it may not rise to the very top of its genre, Fuufu Ijou, Koibito Miman delivers exactly what I want from a low-stakes high school romcom: it's cute, engaging, reassuringly familiar, and only a bit more convoluted than necessary. Enthusiastically recommended to all habitual enjoyers of such things.
* Romance manga aimed at male readers too often ditch the "falling in love" part. They instead start with a flawless dream-girl's inexplicable devotion the male lead, then add 50-100 chapters big, watery, goop eyes. There's nothing necessarily wrong with that approach (Dosanko gyaru is, after all, mega cute). But it's a lazy formula that tends to inspire dull stories.
** If contemporary writers can't move past the "socially awkward, hypercautious, and emotionally dishonest male MC", then please let them figure out a few new ways to portray him. I doubt there's a single regular manga reader in the world who isn't sick to death of this uptight-yet-spineless oatmeal person and his endless flood of fake misunderstandings.