Reasoning Upgrade Baby

The system baby who can grow bigger gradually grows into a pretty beauty as the protagonist's ability improves. The protagonist, a low-powered detective, slowly grows into a master of reasoning. As the curtain opens, each secret is unearthed, and the person behind it finally cannot sit still. Master, if you make another mistake, I will turn into a child! Ah? No way? No matter how young you are, it will be gone? Okay, I'll be more serious! But you said it yourself, if you open it up, you will become a real person, right? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.