This bl is set I think in 70's to 90's and the mc get transmigrated into the body of a ger (nit sure but this is definitely a mpreg). The og mc have a child birthed because of a one night stand and he can't remember who the father is. The mc is a bit of a gary sue in my opinion but not too much he is good in making profit out of a simple things like popsicle and foods. He always did his best to care for the og mc son who is 3 to 4 (or 5) years old only. The ML is the uncle of the friend the MC have when he sells the popsicle and the ML doesn't know that the MC is the one he had a one night stand with because there is this another guy who pretended to be the one who have a one night stand with the ML. That is all I can remember.