Starting Out by Hunting Saintesses

The overworked Yan Ke got a System that could "read women's minds," making him unbeatable with ordinary women. But the System doesn't work on Ada, a candidate for sainthood. Then go die! After meeting Ada, he gets caught up in an investigation into a series of disappearances. But, Saintess, I really don't want to investigate anything. I just want to stab you! This book is also known as "To Hunt Monsters, I Had No Choice but to Debut as an Idol" and "I Mastered the Art of Flirting, but All I Want Is to Meet a Normal Woman"