I mean if you think about it, the first couple doesn’t have a perfect ending but they would consider it a happy ending, their relationship was just that beautiful, that they were happy as long as they were together, no matter what form
Their our main character's coworkers, they already appeared a few times, that girl was in love with Inoue but never tried anything and gave up when she learned he had a gf.
Sigh, yeah nothing to raise alarm there