ปริศนาความทรงจำ / Hyōka / 氷菓
Rank: 5007th, it has 435 monthly / 22170 total views.
Genres: Manga / Mystery / School life / Slice of life
Status: Ongoing
Summary:
A boy named Houtarou who is not assertive about getting involved, but was ordered by his older sister to join the classic literature club. In the club, he gets close to the truth about an incident, involving a female member's uncle, which happened 33 years ago. The "energy-saving" boy is joined by an inquisitive girl in this adolescent mystery.

adapted from the light novel series of the same name