Author didn't described Rin yet but so far it is good.Stability of the updates is good.He is publishing one or two chapters per day.System isn't that powerful and there is no plot armor at least for now.Author makes some typos but it isn't a problem enough to stop reading.I liked the bond between Haru and Rin but Haru seems like obsessed with Rin.If i consider his past then it must be normal.I suggest this book and author's imagination is vast so it is impossible to be bored.