Wrong artist, it's by the same one who made Blight of Man
https://mangadex.org/title/df1a09fe-d773-4755-90ae-ab34db033769/jinrui-shoku-blight-of-man
It's this Satou Yuuki
https://mangadex.org/author/dc21a571-7b70-4927-87be-215aab4216fd/satou-yuuki
Now the big question, they become his harem?
The golem and childhood friend are probably are
The grandaughter will probably use "not blood-related card", but I hope she's not
The hero maybe no, just a bro. Probably would be if the MC reincarnated as a girl during that life