[1] Kōsaki felt it would be interesting to feature Hanazawa rapping in a gentle manner, inspired by Shibuya-kei music and Japanese hip-hop artist Kaseki Cider.

[10] Similar to Hanazawa's song "Melody", "Renai Circulation" is focused on a narrative with rap elements against a "funky tune.

[12] The chorus opens with the Japanese onomatopoeia fuwa-fuwari (ふわふわり), which means "fluffy" and is used to describe "cute, upbeat, or insubstantial things.

"Mousou Express" was released for the 2013 anime series Monogatari: Second Season, which adapted Otorimonogatari and was used as the opening theme song to the "Nadeko Medusa" story arc.

[12] The song depicted Nadeko's descent into madness about her unrequited feelings for Koyomi Araragi and was seen as a response to "Renai Circulation.

"[3] Anime News Network described the song as "cutesy as all get-out" and that it framed Nadeko as "cute and dramatically vacuous", making her a cliché moe character.

[21] In October, Hanazawa performed the song at the Dream Entertainment Live, an event celebrating the 55th anniversary of All Night Nippon.

[1] Nadeko won first place in a Bakemonogatari character poll held by anime merchandise retailer Toranoana, with some voters citing "Renai Circulation" as the reason.

[24] In 2022, Hanazawa stated that the success of "Renai Circulation" led her to receiving more offers to perform character songs as well as a singing career.

[17] On December 18, 2019, Chinese electronics company Xiaomi posted a parody version of the song video on Bilibili about their Q3 financial report using processed voice clips from their CEO, Lei Jun.

[1][26] In 2021, "Renai Circulation" spread outside of Asia on TikTok as well through a 2012 English-language cover version by American singer Lizz Robinett.

"[30] In 2022, "Renai Circulation" was used as an ending theme song to the child-rearing program Sukusuku Ko Sodate [ja] on NHK Educational TV.

[1] In 2022, a cover version performed by Hotaru Shiragiku (voiced by Satomi Amano) became available as a playable song in the mobile game The Idolmaster Cinderella Girls: Starlight Stage.