So the sister magically still lives somehow and (my guess) will probably come back in the future still being as strong if not stronger than the MC ( who will no doubt have gone through character building) because for some stupid reason yandere love transcends logic. Might as well just let sister...
MC allowing himself to be threatened and lectured by a pretty boy who takes advantage of minors. Why am i not surprised that's the route author was gonna make? Someone make an NTR hentai where MC watches this guy bang Sayu in his apartment.
Read this manga quite a while ago and dropped it coz I couldn't stand spineless MC thinking with his dick rather than his brain. Is it worth picking up now? Left off around the time rent-girl got introduced to MCs grandma.
This one started out good and had real potential but then went downhill fast. Essentially author built up MC to be uber strong swordsman for a bunch of chapters just to end up as some noble brat's attack dog.
This has sadly turned into mediocre rubbish with the newest arc being added ontop of the existing boring prostitute arcs. God i hate MCs who are consistently being goody-two-shoes.
I hope he commands every male in town to rape the princess. Boy oh boy.
Edit: I agree with the other comments. All the story has going for it is the revenge-plot. Take that away and it's a bland story at best.