Who tell you that I don't like boobs?! I love to squeeze boobs, love to suck em and fuc* em, But that only avaible in real world, that the problem dude.
Fanservice is everywhere in japanese manga, ofc. BUT thing is that there exist fanservice that didn't ruin plot and characters. Like did you see girl that let you squeeze her boobs without even kiss her? I mean there are girls like that, but you usually call em sluts or prostitutes. Case that is not normal behavior. That just saying how low she is...basically trash person.
So...the fact that these was showed already at the very beginging just saying in what character she will turn later. Someone dare to compare this trash to Rave Master. Rave Master has fanservice ofc, it's Mashima work...but it is good, while this is bad. Litteraly same thing as comparison between eating in restoran or eatng from trash can on the street.