So, a few things: first, Norio Sakurai is a woman,
she is the author of The Dangers in My Heart. Second, she does not have any other series ongoing right now, BokuYaba is the only series she is working on right now. What I think you're thinking of, and got confused on, is during the first 2 years of BokuYaba's serialization Sakurai was working on a second series; she was finishing up her second successful series
Rororro, which compared to Mitsudomoe was a lesser, more modestly successful series as it did not get an Anime adaptation. Third, I would think Sakurai is very much invested in continuing BokuYaba for the next couple of years as BokuYaba has become a much more successful and popular work by several degrees of magnitude than Mitsudomoe ever was, & in a much shorter span of time + length of work.