Which one? The one who won the lottery and hid away? Or the one where he moved into his grandma's house and he has 2 sisters? Those are the ones I know.
https://www.mangago.me/read-manga/takarakuji_de_40_oku_atattandakedo_isekai_ni_ijuu_suru/
Isekai de Cheat Skill o Te ni Shita Ore wa, Genjitsu Sekai o mo Musou Suru)
https://www.mangago.me/read-manga/itsudemo_jitaku_ni_kaerareru_ore_wa_isekai_de_gyoushounin_o_hajimemashita/
How did I forget this one? Σ(っ°Д °;)っ
The very first manga that I read with a portal between two worlds was the one guy who won a lottery. Strange, I forgot that the dude won a lottery lol. Thank you for the link. I just remembered he got a house with a portal.
Damn that one didn't update for almost a year, is it on hiatus or got axed
?
This one reminds of a manga with Male mc where he kinda inherited a house that has a portal from another to world and he can travel back too modern timeline just to grocery. Anyone knows the title. Don't know if it still active and ongoing though.