Tada no Murabito no Boku ga, Sanbyakunen Mae no Boukun Ouji ni Tensei shite shimaimashita ~Zense no Chishiki de Ansatsu Flag wo Kaihi shite, Odayaka …

[dmbase]

Damn, gingers can't even catch a break in a fantasy world

Yes, that was established in chapter 5, also he's not a brother but from a different family, presumably that was his father he just killed at the end of this chapter.

Did no one read chapter 5 or something? He directly references the epic of Wilhelm in his internal monologue

How silly of me, forgetting about a minor detail that I read about 9 months ago... /s

 

[ARealCoolGuy]

Did no one read chapter 5 or something?

How long ago was that chapter released?

 

[monkey123]

And thus NTR hero makes his next moves.