MC died protecting his beloved childhood friend and his little sister from a purse snatcher that have a knife

god apologizes , telling our mc that he supposed not to die and live a long age but because of god mistake or something like that, he died

the god say he can't revert back time to revive him because it is against the rule so he reincarnated him to another world and telling him that the god give him amazing blessing/power.

So mc reincarnated as 8 or 10 years old kid , in a duke family. The duke first wife already died and he married another woman which was mc mother. MC have high affinity for magic because her mother was a powerful mage

MC also have a big sister who was 3-4 years older than him(she was the first wife child). They both go to carriage seems go to school or such and mc have power to check other people stats and realized her big sister have big brother-con stats, when mc check his own stats , he realized he have OP powers that may bring attention or troublesome things and say what the heck god, why you give me this power.

This is from light novel but got manga adaption

it was https://www.mangaupdates.com/series.html?id=147856&method=useful

found it anyway thanks haha