Well, isekai anime got famous thanks to rimuru sama.. and then there is flood of isekai anime,
Than, within the niche, there are few plots..
1. Mc being ultra dense, sometimes 1 brain cell(inspired by eminence of shadow)
2. Mc is abandoned by his party than they realise mc was actually OP and holding party..
3. Harem, reverse harem
4. Princess gets kidnapped, caught by bandits group and mc saves the day..

The plot are so repetitive, well come on.. please come with original plot already