 If you liked
No Fatigue: 24-jikan Tatakaeru Otoko no Tenseitan
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 ...then you might like
World Teacher: Isekaishiki Kyouiku Agent
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In both novels protagonist is a reincarnated otherworlder, and a child prodigy from the start with cheat-like abilities.
1) Both main character are killed for a person in his previous life
2) Both main character are "genius" since his childhood
3) Both main character have almost the same thoughts
4) Both main character are very overpowered
5) Both main character are children of a nobleman