Hi I'm looking for the title of a certain isekai manga, I think. I am not sure if the main character is a reincarnator from another world but I'm pretty sure.

The main thing I remember is the main protagonist starts as a young child. His father has two wives, and he treats one of the wives and her son better than the protagonist and her mother. The main reason I believe was because the other son, the protagonist's half brother was born with a certain skill or ability related to combat.

In the setting of this world people have special skills. I'm not sure if it's just the aristocrats or everyone.

The protagonist meanwhile received a skill that let him purify or detox poisonous materials, which didn't initially seem that special. However, later on he learns that certain magic crystals have to be purified before they can be used, and his ability works on them.

A few chapters in, he purifies something and turns it into a sort of crystal-like flower that he gifts a noble girl and his mother. I can't recall what the original material was only that it was supposed to be difficult.

His mother later reveals that she's the princess of another country and decides to return to that country after breaking ties with her husband who she's fed up with how he's treating her son and her.

The overall tone is relatively light-hearted so far.

Thank you for reading this.

It's Maseki Gurume: Mamono no Chikara o Tabeta Ore wa Saikyou!.

That was it. Thank you.