It was a side story in a manga, about a brother who started dating his coworker, after the coworker confessed. The coworker couldn't believe the feeling was mutual and ttgey had a falling out, which they ended up clearing. I remember certain dialog, like when he responded to his confession, he was like "if you were serious about the confession, I will go out with you, if not then you can forget about it"
It was a side story in a manga, about a brother who started dating his coworker, after the coworker confessed. The coworker couldn't believe the feeling was mutual and ttgey had a falling out, which they ended up clearing. I remember certain dialog, like when he responded to his confession, he was like "if you were serious about the confession, I will go out with you, if not then you can forget about it"