System************

Shen Yanci drew a list and listed all the suspicious people: anonymous forum posters, regulars in coffee shops, men in black at the school gate, and old librarians. He analyzed them one by one and finally targeted the administrator. This kind of male protagonist who "uses mathematical thinking to solve crimes" is so handsome!

This book is crazy! Salty female protagonist + paranoid male protagonist, he suspected her identity from the first day, but silently protected her. It's so sweet that it screams, it's so cruel that it hurts, it stays up all night to tie the knot, it's a strong amway!