Kotoura-san Ep. 4: Changing World

Kotoura, oh Kotoura, where art thou Koutora? Pardon the bad reference but you get the idea. Our heroine is missing and the show cannot go on. So they journey off to find Kotoura and after meeting her nice, pedophilic grandfather, the group gets reunited at long last and something interesting happens. Moritani actually apologises, so…

Changing World, Kotoura-san Wiki

The Background and History of Kotoura-san

Kotoura-san Episode 11 – Moeronpan

The Troubled Life of Miss Kotoura: Season 1 (2013) — The Movie Database (TMDB)

For all your daily dose of Kotoura

Kotoura-San It's Not a Date - Watch on Crunchyroll

What are the top anime with short episodes (under 30)? - Quora

UK Anime Network - Kotoura-san - Eps. 1-3

Kotoura-san/Episode 2 - Anime Bath Scene Wiki