This anime feels like an episode of the main series. With every episode roughly 3 minutes long, you can finish this in one sit. Filled with humour and hillarious skit left and right. The episodes is not connected so you can watch randomly. This OVA takes place around the season 1. Highlighting of how they life their daily life. I have a really great time watching this, even to the point my cheeks hurt because i can't stop smiling. The viewer can get to know closer about their favorite characters. There's barely anything new except for the fact that its a bonus episode, more laughing stockto keep your sadness away. Same art style, same seiyuu. Oh yeah this OVA doesn't have any song at all. But they still keep the BGM exist, without it, the episode would feel dry. So should you watch this? If you are a superfan of this series and want more content to consume, then yes. But if you want to skip that's fine too, tho I do not reccomend because you will miss some really entertaining episode.