The Unexpected Discovery That My Live-in Boyfriend's Affair Partner Was a Man

I was called out by my boyfriend I live with, and the place we went to was a hotel restaurant. I headed there expecting it might be a proposal, but instead it was a breakup talk. He already had someone he liked—and that person was unexpectedly a man?! A story about a dumped woman complaining endlessly to an old friend she's comfortable with. ※Contains BL elements. Please be cautious if this is not your preference.