People are shitting on this one but... well it does goes meh really quick, one of the reason is the last scene is not as powerful enough because this series is too short, so the bond between characters at the end feels forced (im assuming either the mangaka is tired, or its just axed and he found the best way to end it) .
HOWEVER, he managed to put 2 character development even though its small, (togame admiration towards MC & Mimura's actually does care towards MC) which to my opinion its amazing despite short 18 chapters. i believed if this series was given the chance it deserves, that ending would be so much powerful...
CONCLUSION: the only problem with this series is that its too short. still not a bad thing to read (it feels like watching a short movie)