Sekirei (2008)

You've seen a million shows where heroes go toe-to-toe, now feast your eyes only the only anime where hot girls with super powers settle their differences chest-to-chest. Minato had no luck with the ladies until the day a well-rounded warrior babe named Musubi fell into his life and crushed his face with her ginormous cleavage. Hunted by a stunning pair of twin sisters, Musubi was searching for the right guy to give her a squeeze and unlock the hidden powers lurking beneath her ample assets. Minato fit the bill, and now he's caught in the middle of a supernatural slugfest where voluptuous vixens take turns beating each others' clothes off. Only one of these bodacious brawlers will come out on top, but the unbridled excitement of watching them go at it makes this utterly-fulfilling series the breast action-harem anime of all time.