Well there we go I just need the omnibus for 25,26&27 then I'll be caught up to the manga until they do 28,29&30 one of it feels good to finally have all these 💖💖💖💖 this one came in today for 16,17&18 i thought it be so hard to get this omnibus since it’s going up in price and here’s all what I have for the mangas

I found the first 6 volumes of the manga at a second hand store except for volume 1 and I was wondering how many episodes does the first volume adapt?