This manga seems like a good start, but didn’t manage to get anywhere. It has an interesting main character and heroine, in that they pretty much had a strong relationship from the first chapter, and with Tsukihiko being oblivious and Sami being adorable it was quite amusing. It doesn’t really have enough time to do much with it though. The side characters like Tsukihiko’s sister or the transfer students from Ryoujin seemed like they could be interesting too if it focused on them more, but it never got a chance to. There was actually a pretty solid amount of world building and what was built up I liked the style and structures of, and felt like it allowed for a lot of cool action and intriguing plot lines, but that too never got a chance to be used. The action was pretty solid to and it introduced some cool systems, but it never got a chance to do anything with them. The plot too was going in an interesting direction using all of this, but then it just abruptly ended. The art was also good, but it didn't feel like there were enough shots that used it well. If it isn’t clear yet, I overall liked pretty much everything about it, other than the fact that it ended too soon.
