Mundanefan's manga / #sexual services(1)

An alpha who wants to be an omega, disguises himself as an omega and has a side job as a prostitute (?). He gets together with an alpha, and tells him that he is an alpha and that he can come inside of him, the next day the alpha top leaves. The alpha bottom leaves his work, and 3 years later he finally finds the top, and confronts him. He has given birth to his child and wants him to take responsibility for the child. The top has been looking for the bottom for these past 3 years, however he didn't his name, but only the fake one that he went with in the sexual services.