It's a rare pair because most of the fandom ships MaHiKaren or MaHikari. To be fair Mahiru did eat Karen in Re: Live and Hikari and Mahiru have great chemistry. That's in addition to how all three's chemistry with each other is when they're together.
i kind of get that everyone thinks nemo would do something pervert with that.
But the moment i see that part of the chapter i was just thinking of nemo on her bed looking at tomoko and smiling like an innocent child due to so much happines.