Hyouka: Motsubeki Mono wa
Episode 11.5, an OVA bundled with the third volume of the manga. Oreki Houtarou gets a job at a swimming pool.
Alternative: Hyouka Episode 11.5, Hyouka OVA, Hyou-ka OVA, Hyouka: You can't escape OVA, Hyou-ka: You can't escape OVA, Hyoka OVA
Duration: 24 min/eps