The manga is like a 10/10 masterpiece, but this anime adaptation was rushed to make it fit into 12 episodes. For the example, the scene where Odagiri sees Yamada & Shiraishi kiss, the anime was rushed and didn't give the scene enough time to make the viewers feel like it's a big heartbreaking moment for Odagiri (like how it was in the manga). If you're about to start watching this, I recommend you to read the manga first, and then comeback to watch the anime as a bonus. Don't ruin your own experience by watching the anime first. I'd love to see a second season though.