Hyouka: What Should Be Had is a oVA anime that premiered in summer 2012, produced by Kyoto Animation.

About the production: the story comes from an original script, there is 1 episode of about 25 minutes and its current status is "finished".

Its main genres are mystery and slice of life, with themes such as Detective, Work, Male Protagonist and Primarily Teen Cast.

On AniList, Hyouka: What Should Be Had has an average score of 72%, a good score, and appears on 54,553 users' lists.

Was bundled with the third volume of the manga. It's another regular day, with Houtarou Oreki sitting at home as usual; that is until his sister Tomoe ropes him into working as a lifeguard at the local swimming pool. Upon reaching the pool, Oreki coincidentally meets the other members of the Classics Club. Eru Chitanda notices that a white object that was on a woman's ear a while ago suddenly disappeared, which leaves her curious about the mystery behind it. Hyouka: Motsubeki Mono wa features Oreki and the rest of the Classics Club as they have fun at the pool and solve the mystery that has piqued Chitanda's curiosity. (Source: MAL Rewrite)

Official synopsis from AniList.