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Manga/manhwa where the MC is Isekai'd into a fantasy world and later gains a monster companion. Romance is fine as long as it's not the main focus. I like adventure. And absolutely NO harem or reverse harem.
Something like these two:
https://www.mangago.zone/read-manga/saijaku_teima_wa_gomi_hiroi_no_tabi_o_hajimemashita/
https://www.mangago.zone/read-manga/tondemo_skill_de_isekai_hourou_meshi/