Wagatsuma to Hatsukoi to

Alpha Arthur and Omega Kiri were brought together through the government's matching program and became husbands. Since it wasn't a love-based marriage, their relationship remained stiff and awkward while six years have passed. But one day, everything changes...!?

(Source: Shinshokan, translated)

Note: Originally published as a one-shot in Dear+ 2019 December issue, was then picked up for serialization.