If you liked
Arifureta Shokugyou de Sekai Saikyou
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...then you might like
Shinka no Mi: Shiranai Uchi ni Kachigumi Jinsei
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An entire school class is summoned to another world to fight a demon king. MC is regarded as useless by the rest of his classmates and is abandoned. MC obtains new skills from fighting monsters and becomes OP. Similar romance setup (if you can get over that one girl is a gorilla).