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Ring-ring- Ring-ring-.

I was lying on the living room floor reading an economics paper when my kids' phone rang.

I lifted my head with a start.

I’d bought this kids' phone for my work as a professor.

With its pink case and adorable bunny stickers, it looked exactly like a child’s toy.

But it was still an official means of contact for a Seoul National University professor.

So only a handful of people knew this number.

Mom and Dad, the department chair, the dean, and Jae-hyuk and So-young from our lab.

In other words, if this phone was ringing, it almost certainly had to be about work.

Ring-ring-...