It's OK to Fall in Love Without Reasoning, Right?

Classmate Ma Gezhen is very cute - this is an undoubted fact! Du Zhenbang, a descendant of a famous detective family, believes so. However, is cuteness equal to justice? Mysteries appear one after another on campus, and the quasi-detective's professional and serious reasoning is actually slapped in the face every time by the nonsense of Gema, a layman! What happened to this world? Now even the detectives and relatives want to investigate Ge Zhen, suspecting that her ancestors took away mysterious evidence and the truth in the supernatural case a hundred years ago. The would-be detective is worried whether he should investigate or please his sweetheart. In an unimportant mystery surrounding takoyaki, the key to the truth lies in the girl's cute smile!