for those of you wondering why this got cancelled, the manga magazine it published in, Gangan Powered, ceased publication and took this with it. It happens more often than you might think, and for whatever reason they couldn't get it transferred to another magazine, so it died along with the publication it was in. A true shame but many of my favorite manga have no proper endings due to various cancellations, such as Instant Bullet by Kaguya-sama's mangaka.
For what it was, it was a fine ending, it wrapped up what it could and wasn't as sudden as some thing I've read. I wish the mangaka would come back to this but seeing as he's much more successful with his low brow ecchi manga perhaps he should stick to those.