try shoukugeki no soma (devotion to cooking)
bartender(customer service + psychology?)
black butler(devotion to master with action)
akb49(devotion to making one's crush into an idol by supporting her as an idol; with gender bender)
Devotion to acting
http://www.mangago.me/read-manga/w_juliet/
Devotion to medicine
http://www.mangago.me/read-manga/saijou_no_meii/
Devotion to cooking
http://www.mangago.me/read-manga/addicted_to_curry/
http://www.mangago.me/read-manga/shokugeki_no_soma/
bakuman(addition to becoming a manga artist with an anime that would have one's beloved as a seiyuu)
Thank you for answering!! I read all of them except akb49!! I'll give it a try!! Thanks again ^^
Thank you so much for your answer!! I haven't read w juliet yet!! I'll try it out!! ^^
Thanks for answer!! But i already read & watched Bakuman ^^
In short mangas that show the mc's devotion to his/her career or the rules & basics of customer service. For example -
http://www.mangago.me/read-manga/bambino/ (devotion to cooking career + customer service)
http://www.mangago.me/read-manga/sold_out/ (related to customer service in sales)
http://www.mangago.me/read-manga/skip_beat/ (devotion to acting)
http://www.mangago.me/read-manga/the_one/ (devotion to modeling)
I AM OPEN TO ALL TO GENRES. Knock me out with your suggestions!! ^_^