First i would killed that old shit asap, second why the fuck this story still countinues, it should have wrapped up with opening a cafe, being lovely dovey etc. Like the last season even match with the whole story concept.
It's called showing what's beyond the "happily ever after". The grandpa is literally showed in the first season. He's also a crucial character and plus some of us are actually interested to see what happens after their good life. This is when the chaos starts to unravel itself. If you don't like it, don't read it. It's only for the people that actually understand how ts goes.
i didn't like it, yet I'm still gonna keep reading it. That's just my take on the story. If you can read my comment and reply even though you disagree, I think I have every right to voice my thoughts on an ending I didn't like. Yeah, the grandpa was introduced in the earlier seasons, but depicting him like this was straight-up shit; it ruined what was otherwise a really sweet story. It might be okay for you, but definitely not for me.
Red heads face has changed a lot in side stories, he was epic back than, wtf (╯°Д °)╯╧╧