This is only a Recap from the first season so it's good to watch after many years if you want to refresh your memory or you're an anime completionist like me. It takes content from episodes 1 to 13 as said in the synopsis so it's not full of information. I wish this recap were from the 24 episodes but maybe they don't do it cause it'd be too long, idk. Although it's skippable I'm writing this because I found interesting how a recap from 2009 tells you that this story won't have a happy ending (it's Dec 2021 and the manga is still on). I'd suggesta watch to fans just for those short phrases Tanaka says about the ending.