Which is the name of this manga?

It's XXXXまみれ. (The Xs are part of the name) You can find it written like this too: XXXX(チョメチョメ)まみれ. Awesome manga, very good art and chara design.

English title is 「ＸＸＸＸ ＣＯＶＥＲＩＮＧ」