Doushiyoumonai Boku to Kiss Shiyou

Synopsis

One woman and four men. Their romance begins now. Ai Miyano is what everyone considers a good woman: without affectation, not cliquish, and extremely delicate. That's why men want to make her theirs, but they can't have her. Whom has she loved...? A fuck-buddy, a childhood friend, a friend she quarrels with, and... One woman and four men, whose threads of love begin to entwine. To love is... a sin? Love is fleeting, and also eternal. (Source: Shogakukan, translated)