Tedium Children, commonly known as Tsurezure Children (徒然チルドレン, Tsureure Chirudoren) is a Japanese manga series written and illustrated by Petos (ペトス), more specifically Wakabayashi Toshiya. The series began serialization in Kodansha's Young Magazine the 3rd magazine in September 2014 and is being published in English by Kodansha Comics USA. An anime television series adaptation by A-1 Pictures began airing on 7 January 2017.
Described as a "heart-pounding love comedy", the series features young people who find themselves in various embarrassing and awkward situations when they try to confess their romantic feelings to one another.
More details: List of Chapters
Wakabayashi originally started publishing the story online in 2012 without actually giving it a title; it became known simply as "Toshiya Wakabayashi's 4-koma comic collection". Afterward, it started serialization in Kodansha's Weekly Shōnen Magazine in 2015 with entirely redrawn art. Tsurezure Children has 12 volumes, and 212 chapters.