Check your brains at the door, there’s nothing but boobs here. I happened upon this gem months ago and it took forever to hunt down the raws. Oppa!!, also called Oppai-Esper, おっパ!!, by Imusanjo(Sonicomi) was serialized in 2011, in the legendary(now dead) Champion Red Ichijo magazine and is one of the lucky ones to get a tankobon release.
Oppa!! (1 Volume, Complete)