Toilet-bound Hanako-kun. It's a manga about a cursed girl with fat ankles (Nene) who meets a shota ghost (Hanako-kun) and decides/is forced to help him to clean bathrooms. Soon they befriend an exorcist boy (Kou, the blonde boy in pic related) with more courage than brains and together they work to keep other school spirits in check so they don't cause a mayhem. Another of the important characters is the smug ghost trap (Mitsuba) that was posted above. He befriends the group and Kou in special, but shit gets complicated when certain character appears.
The manga is like if /c/ and /cm/ (but mostly /cm/ since there are more boys than girls in the manga) met /x/. Everyone is cute and spooky as fuck, with some feels and sad backgrounds. There has been a daily storytime of the manga on /a/ for a while (they just finished volume 10), in case you want to read it.