Title: Jiken Jaken! (じけん じゃけん！) Link: https://mangadex.org/title/30906/jiken-jaken Description: A beautiful, talented and mystery-loving high school girl and a younger school boy solve mysteries in their day-to-day lives at school. not all detectives are turned into brats with sleeping darts.....life is full of mysteries albeit imaginary.....
The art is weird. Not bad, she feels like a copy of Yumeko from Kakegurui at first but you can tell from the depicting skills of the mangaka that shes a unique individual that isn't just a knock-off copy of a popular type of heroine. *Thumbs up*