KO One: With the Achievement System, I'm KO 1 from the Start!

So far, there aren't any big problems. It's to my liking in the ultimate series, but I guess it won't go far. How can you keep readers with one update a day?

The harem is quite enjoyable, but the first dozen or so are a bit sudden, too many are not easy to handle, and there are already a lot of female characters to wrap up the plot.

It's pretty good, worth a look