It's good but I'm dumb

There are two version. the first one 1, 2, 3, 4, 5 is released in magazine. But after sometime, the mangaka decided to release it on a full volume (tankoubon) and the story was rewritten. That's why after chapter 5, it stopped abruptly. The new vol is red 1, 2, 3.1, 4.1, 5.1, 6.1 (End).

Chapter 2.5 and 4.5 obviously just extras. ╮(￣▽￣)╭
Hope this clear up something or another.

Thanks! I needed this guide ヾ(☆▽☆)

small correction: read instead of red (I started looking for a red mark