The text you provided decodes from percent-encoded UTF-8 to the Japanese title: ( Hitozuma no Kuchibiru wa Kan-Chu-Hai no Aji ga Shite ), which translates to "The Married Woman's Lips Taste Like Canned Chu-Hi."
Mengo Yokoyari (best known as the illustrator of Oshi no Ko and the creator of Scum's Wish ). Genre: Seinen, Drama, Romance, Slice of Life. The text you provided decodes from percent-encoded UTF-8
The "Canned Chu-Hi" motif is a recurring symbol for "cheap" or everyday adulthood—contrasting the mundanity of married life with the sharp, temporary sting of an affair or a forbidden attraction. Where to Read The text you provided decodes from percent-encoded UTF-8
Chapter 12.1 is generally categorized as an extra or "bonus" chapter. In this specific series: The text you provided decodes from percent-encoded UTF-8