This is better than the main series, a short but better plot, no unnecessary drama, although Iwata is very silly in the beginning, it has more evolution than Fujiwara with Hitsuji, Akemiya is cuter than Hitsuji and less melodramatic and indecisive.
Akemiya and Iwata love each other, and there are no rival rivals too, not that I hate, but in the main series they abuse much that Shirotaki and Fujiwara are just cute boys, Iwata has more personality and style than those two generics (although I prefer to Shirotaki).
In summary, these 5 chapters are better than the other works of this author, and better than the 30 chapters of the main series, which has only become one of tin marin by don pingue ....