"Koi" was a commercial success in Japan. The single debuted at number two on the Oricon Singles Chart and the BillboardJapan Hot 100 chart, before peaking at number one on the Japan Hot 100 the week after,[1] becoming Hoshino's first number one song on the Japan Hot 100 chart. Since then, it has topped the chart for a total of 11 non-consecutive weeks and has spent over 100 weeks on chart.[2] It won Song of the Year by Download at the 31st Japan Gold Disc Award, and topped the Japan Hot 100 year-end list in 2017, despite being released in 2016. The CD single has been certified Platinum by the Recording Industry Association of Japan (RIAJ), while the song has been certified Million. Overall, it has sold over 2 million copies in Japan.[3]
The accompanying music video directed by Kazuaki Seki features Hoshino and Elevenplay dancers performing a series of dance moves, dubbed the "Koi Dance". Performed by The Full-Time Wife Escapist cast at the end of every episode, the dance became viral in Japan and has since been covered by many people and famous celebrities.[4] To date, the music video has been viewed over 190 million times on Youtube.
^"オリコンランキング情報サービス「you大樹」" [Oricon Ranking Information Service 'You Big Tree']. Oricon (in Japanese). Retrieved September 30, 2014. {{cite web}}: Unknown parameter |subscription= ignored (|url-access= suggested) (help)