Looking for a manga

[A54013]

It's a reincarnation fantasy manga. The main character was transferred to a novel/ game that he knew as a side character, the son of a noble family. He studied and became friends with the OG protagonist, a commoner. He wants to keep the protagonist alive. They joined the army and both parted ways (the main character fought with his family, and the OG lead had his group), to fight monsters (maybe a war). He managed to help kill a lot, gaining fame and was awarded by the king.

Sorry if it sounds incoherent, that's all I remembered.

 

[undeed]

Maou to Yuusha no Tatakai

 

[A54013]

Maou to Yuusha no Tatakai

Thank you

 

[TestAddress]

Seems legit readable.