Recommend me some pure fanservice manga
this, I came bricks
High School Girls.
The Diary of Ann Frank
Princess Princess. Though perhaps not the kind of fanservice you're looking for.
newfag here, what's YKK?
Most of the harems have good fanservice
Yokohama Kaidashi Kikō, some fanservice manga that weeaboo slice of life fags insist is RELAXING or whatever