Vol.4 - Kijima-kun no Renai Shiken : http://www.blmanhua.net/manhua/3458/7059.html?p=1Vol.5 - Kijima-kun no Omotenashi : http://www.blmanhua.net/manhua/3477/(Volume 5 is so interesting , you can read Why I'm telling this *_*)
Vol.4 - Kijima-kun no Renai Shiken : http://www.blmanhua.net/manhua/3458/7059.html?p=1
Vol.5 - Kijima-kun no Omotenashi : http://www.blmanhua.net/manhua/3477/
(Volume 5 is so interesting , you can read Why I'm telling this *_*)