Nozawa-sensei did make a few ecchi series before 100 gfs. It's also funny looking back on the series because it used to be a bit more risque.I don’t know what the illustrator made earlier, but only they can draw a regular kiss as if it were a passionate hot sex .... and I like it.
Its been established that Rentarou would have sex if he could but he is abiding the underage laws.How does rentarou spend so much time with his girlfriend's alone in their rooms with only kissing?