It really pains me to give this OVA a rating of 4 as I rated the main series a 10. I was disappointed since the OVA was mostly composed of compilations from the previous episodes and the last part where Sakamoto was in the Spacecraft which could just be another imagination of his former classmates. Aside from the disappointing plot of the OVA, the art and sound is the same as the main series'. I would also like to give this OVA a kudos for expressing how the side characters truly feel about Sakamoto. In my opinion, you should only watch this OVA if youreally have nothing to watch anymore as it doesn't really have the same level of humor compared to the main series, and as I said before, this OVA is mostly composed of compilations from previous episodes and does not offer a concrete ending.