Downer-kei Oneesan ni Mainichi Kasu no Uso wo Nagashikomareru Hanashi

In your boring ordinary life, you suddenly meet an older girl who likes to talk about nothing in particular. The manga adaptation of a popular ASMR voice work that has been trending on social networking sites. This is a slice-of-life comedy with a mysterious big sister that will fill in the gaps in your heart.

(Source: ComicWalker, translated)