Tanaka-kun wa Itsumo Kedaruge

Summary:

This unconventional, surrealist comedy follows an exhausted high school boy who, despite multiple attempts from his friends, still manages to spectacularly... sleep. Much to the chagrin of the energetic (at times bossy) Oota, Tanaka is often found in a blissful state of lethargy, possessing the ability to doze off in any situation, especially in mid-sentence!

(Summaries provided by MyAnimeList.net)