Never heard of this anime or the series of light novels that it originated from (then again, my anime buddy has developed an allergy against light novels for the past several years, so it's no surprise that he's never informed me), but by chance the other day, I heard the ending theme for "Seishun Buta Yaro wa Bunny Girl Senpai no Yume wo Minai"（青春ブタ野郎はバニーガール先輩の夢を見ない...Rascal Does Not Dream of Bunny Girl Senpai）, "Fukashigi no Carte" (Inexplicable Carte). I think I heard it for the first time when it was used as the ending music for one of those anime compilation videos on YouTube whether it be KHORnime or one of the other channels.
I only took a glance at some of the scenes and apparently it's some psychological slice-of-life involving a bunch of high school girls and their relationships with one rather blunt-talking high school boy (would explain why I seem to have only caught scenes where he's being yelled at). The Fall 2018 anime had a pretty high-powered cast including Maaya Uchida（内田真礼）and Inori Minase（水瀬いのり）who also hail from "Gochuumon wa Usagi desu ka?"（ご注文はうさぎですか）, along with Nao Toyama（東山奈央）, Atsumi Tanezaki（種崎敦美）, Asami Seto（瀬戸麻沙美） and Yurika Kubo（久保ユリカ）.
Getting back to "Fukashigi no Carte", I like it because of the cool jazziness of it all although I wouldn't place it strictly as a jazz piece, and I noticed a reggae rhythm in there, too. Strangely enough, there is something Ringo Shiina（椎名林檎）about it as well; not sure if she's even ever provided an anison. It just relays a feeling of a pleasant nighttime walk through the metropolis for me. Ameko Kodama（児玉雨子）and Hidehiro Kawai（カワイヒデヒロ）were responsible for lyrics and music respectively. The above video has all of the seiyuu singing together.
At the end of most of the episodes, the seiyuu performed "Fukashigi no Carte" separately although everyone got together for the song for the first and last episodes. The above video features Seto's part while the video below stars Toyama.