As you can see Samejima-kun to Sasahara-kun has been licensed in English.
https://www.mangaupdates.com/series.html?id=55323
Which means you can't find it on any free manga reader site.
I don't think just the manga on its own is still available on manga sites, but the complete manga along with the drama cds can be found on youtube and dailymotion. yt playlist:
https://www.youtube.com/playlist?list=PLu-HybN1358w7wAsgS8V5Xeb2kznxQc51
i was searching my laptop knowing that i read it, and finally found it on a hard drive but... it's in Russian, gomen.
hee so that`s why..
haha well, i think i`ll just watch/read it in youtube =3
thanks for your helps/replies guys! (^w^)/~
excuse me, does anyone know where i can get manga with 'samejima-kun to sasahara-kun' in it? i know it from BLCD, but when i was seeing for the manga i couldn't find it :'{}