Both stories focus on a couple that not only has a huge age gap, but polar opposite personalities. In both stories we have the youthful blond boy who's enamoured by the dark haired mature man (who coincidentally used to like girls), and how, despite their contrasting personalities, but end up falling for each other.
In both the manga, there's a mature man who works professionally in the fashion industry (clothes/hats), has considerable experience and has made a name for himself in the said field. One day, a very young MC is exposed to a world he didn't know existed, and he immediately becomes fascinated with it. It's also this MC who realizes his feelings for the mature man first.
These stories revolve around the budding romance between a high end tailor, and his unexpected client, who coincidentally shows up at the tailor's doorstep without a prior appointment. Both have beautiful art and realistic developments.